So I've namechanged for this!
Have 3 kids with my ex partner
To be honest he's not the best father but have always supported my kids having contact with him for their sake, he's been very sporadic with maintenance over the years, which resulted in me going through the CSA a few years back, even then he regularly pays what suits him and not what they say he should..
He has just had his yearly review and they say he should be paying more than what he is, by approx £60ish a month. He contacted me asked me to come to an arrangement out with them as he can't afford the extra, I said no! Told him to talk to CSA if he can't afford it..then received a message telling me cos I won't come to an arrangement with him he's going off on long term sick 
what the actual f**
Am I being unreasonable to be absolutely fuming and disgusted with the cretin 