had it with stbx

I know that we all have a hard time going thru our divorce proceedins.  My problem is my stbx is making my life a living hell.  Yesterday, after being late on his  child support and deducting school tuition from the check, despite the fact that I have to pay for camp...can someont tell me if hes is allowed to do this eventhough the courts has alloted and calculated a set amount for the monthly child support?

His lastest was going to the school telling them that they shld remove my bf's name from the pick up list since we have joint custody...which allows me to make day to day discisions according to my household needs...Can a judge order who shld or shldn't pick up my child? what happens when there is an emergency, and my bf is the only one available since he works from home.

My stbx actually took the cops to our hse because he didnot respond to an email that I had sent him regarding my sons pick up from day camp...he wanted the cops to arrest my bf for kiddnapping...is this rediculous or what?

My sis hse was the initial place for pickup, but had to change that after he cussed me infront of her 10yr old and my 4yr old, she does not want her kids exposed to that and besides he totally disrespected her hsehold. This man has no respect but expects to get respect....He tells our son all kind of disparaging things about me and bf...

This has become intolerable and I need to know what to do about this...This is insane