Seeking opinions on what I should do in this situation:
Three weeks ago my employer out of the blue informed me that my performance was below standard and I would be put on a Performance Improvement Plan. Obviously I was shocked and upset but have to admit that a large part of the criticism was justified.
The following week I was given my plan and I decided that I didn't want to work for such an unsupportive company or jump through all the hoops they were expecting me to, so I resigned.
The following day my boss emailed me to accept my resignation and said they would not require me to work my full notice and proposed a leave date in two weeks to give me time to finish a project I'm working on. I emailed back agreeing this date and have since progressed arrangements, cancelling lifts to work, childcare etc.
I have remained professional and continued to work really hard, even doing overtime, despite feeling stressed, humiliated and desperate to just get out of there.
At the end of last week my boss phoned me and said that actually they do need me to work my full notice, that the early leave date was "never formally agreed", and reminded me that I'm "under contract" for a 4 week notice period. They have basically realised that having someone 'incompetent' is better than no one when there are lots of deadlines to meet.
I was caught totally off-guard by the phone call but I don't think I agreed to anything but I will be meeting with my boss tomorrow. What would you do? I don't want to give them any more grounds for giving me a poor reference but really don't think I can cope with the stress and anxiety of working there for another 3 weeks.