I'll try to keep this brief. I have 2 DC with ExH, who was abusive towards me in multiple ways. We have been separated for >2 years, divorced for >1. I'm receiving therapy to recover from the abuse and associated PTSD. Both DC are at school and although the age difference means that they're at separate schools, they're on the same site.
ExH is both charming and manipulative, which explains why I married him and put up with the abuse in the first place. Over several years, he would act atrociously and then spin it so that I genuinely thought I was the one in the wrong and thought I was going mad. He's kept up this behaviour since I began divorce proceedings and I've got better at spotting and challenging it. He's used various threats, explicit or implied, to get me to do as he says or he'll refuse to sign the divorce petition, withhold child maintenance, not being the children back, etc.
Which brings me to the issue... ExH demanded that I supply him with school uniform for the DC, having originally said that he would buy all their uniform. I told him not to be ridiculous and, long story short, he sent the DC to school in plain clothes and wrote notes and went in to explain that I had refused to hand over any uniform, despite him providing it. While he was there, he also managed to get in a few bits about how awful I am about various ways related to the DC, how he's struggling but doing his best despite it all... As related to me by a member of staff, the family workers are now up in arms. They have offered to facilitate mediation and I just don't know what to do. He is using the children and the schools to continue his abuse of me but in such a way that I look terrible.
How do I handle this?