Seeing lots of people reply to their bosses on their personal line outside of work for getting called in last minute due to some business failure on managements part.
STOP RESPONDING. THEY CAN'T DO SHIT TO YOU UNLESS YOU RESPOND.
Block them on off hours if you need to. You will have plausible deniability that you did not receive the message and can't be retailiated against.
You have no contractual obligation to be available to be messaged on your off hours.
Wish you guys the best in this fight. Fuck any asshole management that wants to bend you over in the name of sacrifice and expect you smile while they are doing it.