This is something that needs to be hammered into workers, especially teens who are in school which conditions you to accept this treatment.
If you make a mistake, miss something or are blamed for some perceived failing (real or not) never should you be punished.
A manager isn't your mum and the owner isn't your dad, if there is a problem they should be happy to work WITH you on fixing it. It should be everyone vs the problem, not them vs you.
They can not confiscate your phones, journals or anything else, never ever should they yell at or insult you.
I used to work for Aldi. I was told I no longer had to seek tasks from managers as I was experienced enough to time manage myself.
I was on tills and closed my till in the correct order and went to do other tasks, this apparently 'upset' the manager who was on the till ahead of me as I didn't immediately interrupt her serving a customer to ask her what to do/for a task.
I'd been there 3 years, I knew what had to be done.
I suppose she didn't like that it didn't give her the opportunity to swap with me and get off tills herself, despite it not being her turn.
Many managers would not do tills, despite it being as much a part of their jobs as ours.
She didn't tell me at all this upset her, instead she asked me to go on priority till for 'just an hour to cover breaks' and, not knowing her motives, I agreed happily as that's the job.
7 HOURS LATER, I am still on priority till and no one cared. I approached my manager and said I thought the communication and task assignment wasnt clear and unbalanced. This is when she revealed she left me on tills to PUNISH me for not doing something I was told not to do!
I quit on the spot, told her off and filed a complaint against the her.
I stated that if I had not confronted her, she wouldn't have said anything at all, so the act of Punishment was an abuse of power for a perceived personal slight and she had no intention to teach me to avoid such 'slights' in the future. That if she did this to me so easily, she has most likely done it before.
I never heard anything back and no one followed up, I was literally ghosted by the general manager despite them agreeing to be a reference for me.
The regional manager also tacitly tried to accuse me of abusing sick leave as annual leave, I very quickly shut him the fuck up by reminding him that doctors certs were given EVERY time (Costing me money and hours of waiting time every time), that I had lost so much weight that even customers had noticed and voiced concerns for my health and if he's so worried about my health, he should do something about the understaffing and unsafe conditions.
You are there to do a job, not to be instilled with some group think philosophy or be demanded to confirm your entire personality to them. Your mind and ideology is yours and isn't for sale or open to being negotiated.
You aren't a child and if a senior staff member thinks punishing someone is a solution, they have a completely broken view to what the problem is.
Employers will frequently use the same pattern of abuse that a dysfunctional/abusive family does to control you.
Taking time off? Don't JADE (justify, argue, defend or explain) This is just ammo to them, to attack or dismiss you, don't give them anything.
Feeling guilted into doing extra work, 'for the team'? Get out of the FOG (fear, obligation, guilt) they can not force you to do anything, you have more options and power than they want you to know, you owe them nothing and any guilt to bear isn't your responsibility.
Being mistreated but have a plan to leave? GREY ROCK. Be as boring as possible, make any attempt to get a rise out of you or push you to quit a dull affair, give short one word answers.
Your boss said they 'would/have talked to higher ups/co-worker, they said X”. That's TRIANGULATION. Go around them and speak directly to the other party yourself.
Bring up an issue with your employment and are blamed for it? That's DARVO.
Your boss is Denying, Attacking and Reversing the Victim to Offender role, don't fall for it. Repeat yourself and stay on topic, don't let then deflect their responsibilities.
Don't let them Isolate you.
Long shitty hours aren't just there to squeeze you dry, they want you too tired to fight back. Keep a support system that will remind you that you have worth. Speak to your co-workers about your pay, your duties and tasks.
Always have an exit strategy, so when shit hits the fan you have options. That way you are not beholden to them for any/everything. Don't tell them your exit plan or that you plan to leave at all, just like an abusive family member, they will simply enhance their abuse in retaliation.
Don't let them confuse you into accepting abuse as normal!