I have posted a few times - always helpful advice 
I have a rubbish arrangement with (emotionally abusive and a bully) ex h for when he sees the dcs,it's basicly whichever weekend day suits him and he is supposed to advise me each week, some weeks I don't know until the thursday and often he doesn't see them either day. He refuses to comit to anything due to his work. lately he has missed some weekends, I have started telling him which day they are free, which doesn't always suit him but I am tired of being dictated to by him, the children and I have a life too. Now, I receive an email advising me he is yet again working the weekend but is free two week days when they are at school
he doesn't see them after school, I agreed in mediation for one day after school a week provided he was not working, if he had work he wouldn't see them(was against it but the mediator insisted) he never turned up that once so that was it. I am going to advise him we have plans, which we do and also, we are not friends and the divorce wasn't amicable, his email suggests this casual approach is all ok and he can just do as he pleases, I feel if I agree he will continue to expect week days and my whole week will be dependent on when he can see them, it's bad enough now waiting for each weekend confirmations?? I have never and would never deliberately stop him seeing the dcs, I don't think like that, but I do feel he should make some sort of commitment or am I completely wrong? Thanks for reading