Applied to full time barista position, got hired, have not worked on the bar, manager tried to give me 2 days of work a week

So I got hired as a trainee barista at this place – they said my training would take 1-2 months and I’d occasional be on the bar to learn. I’m contractually supposed to have 4 days of shifts a week. So first two weeks is when most of my training happens because ever since I’ve never been on the bar again. Third week on the job I look at the rota and I’ve been given 14 hours instead of the 36 Im supposed to be working. I said that I was not happy with that so they’ve been giving me 3 days instead of 2 – still shit. Those have all been dishwashing/floor clear shifts. Nothing wrong with those jobs but its not position I signed up for. I’m quitting obviously. I just wanted to rant because this place has made me so angry over the past 2 months.