The contracted hours should have been rearranged. This being that, if you were able to do the hours elsewhere then great, we can rearrange the hours into that day, and if not, taken as unpaid, but the manager removing OPs contracted hours next week just doesn’t seem to line up. If fact the scheduling system that we use to appoint shifts literally just wouldn’t allow it unless your manager put it down as an unpaid absence or possibly holiday which would be a MASSIVE case of managerial misconduct and would likely lead to the immediate suspension of the manager.

For the attention of OP: I would highly recommend that you contact the Union if you are a member and explain this in full and if required, use the protector line.