OK name changed for obvious reasons. I am trying to not go into massive details which could out us.
Ex is extremely mentally ill. He had alcohol problems while with him, assuming he still does judging by the photos I see. He has been an inpatient, under a psychiatrist, he has attempted suicide on several occasions, rang me telling me he doesn't know what he might do and that he wants to die and was aggressive in the home and caused damage to property. I was unaware one of the children had witnessed damage to the property until they disclosed something to school years after we had left ex which triggered me being called in to school.
I am in an difficult situation where ex has so many issues that he doesn't see the children because he doesn't feel up to doing so and doesn't phone them or anything although he does text them once every year or so usually with demands and the kids don't want to see him. To be honest they do not remember him apart from the bad stuff and don't want him to know where they live. One child is at secondary in year 10 and one is in college but he wants this information.
I don't actually know what to do.