I can't go into details incase her manager reads this. But the basics are....
She was in the job before the new manager started. She already knew the manager and had personal issues with him.
One supervisor has already left because of this manager. Instead of advertising the new supervisor position internally and externally the new manager gave the job to a friend of a friend who has no experience what so ever of the role (not even in a supervisory role, she has literally never worked in this industry before). She is constantly having to ask my sister and her colleauge (who are both more than experienced enough to take the supervisor role) how to do her job. She cannot actually work shifts alone because she is not experienced enough.
My sisters hours have been cut dramatically. The hours are still available. They have been given to another member of staff, who has not been in the company for as long as my sister. The reasons he gave for this is that they are 'over staffed', but the person who now has her shifts has more hours than before, so how can this be?
She has now heard rumours that she has to attend a meeting with all the managers because she has been accused of calling the manager names behind his back. She has not done this.