I think you are doing the best that you can do at this point, by simply ignoring him when he was going on about money he eventually shut up and the same with getting in the car and going last night, I don't think you are going to win any verbal battles at this point since he only seems out to hurt you.
DO you think he carries on about the money because, as you stated when he was talking about custody that is the only thing he actually provides as far as being a husband and a father and if you take that away there is nothing left.
Internet is not that expensive, if he cancels it add it back under your name with the money you make from work, you can probably get something for around $20 and it will take the control away from him.
Me~34 H~38 D6.5
EA/PA-DEC.07
Moved out~Apr.13,08 Sep. Papers~Dec.7,08 No contact order ~Dec.9,08 and again October 13, 2009
