When ds1 was in Year 9, his biology teacher discovered he had done no biology whatsoever, the previous term, despite the previous teacher chasing him about it - I hadn’t seen his biology book, so I had no idea. The teacher who made the discovery was also Head of Department, and he offered us a choice - either make up the work in after school detentions, or come in during half term, when the teacher had to be in school anyway, and catch up then. We chose the latter, as we felt it would make more of a point to ds1, if he had to miss holiday time.
Is there any chance that you will be in school during the summer holidays, @PeachyM, and would you be allowed to have this pupil in for the day to copy up,the work they’ve missed? Make them give up part of their holiday to make up for missing school?
That would have the extra benefit that you’d be offering to help - on your terms - so they couldn’t carry on whingeing, and they might refuse the offer, in which case you could say you had been more than generous with your offer of help, and they had refused it, so you wash your hands of them.
All that said, I agree 100% that the parents and the kids are cheeky fuckers, and it is entirely reasonable of you to want your break time, free of doing extra tutoring.