looking for advice, split with ex over a year ago and he put my child maintenance towards mortgage, now house sale fell through so he’s moving back in and can’t buy me out by remotaging as he has bad credit, which has resulted in him trying to buy me out but not going on house value ( just what it was going to sell at before sale through ) and just doing it his way so makes out I’m due him 4K which I wouldn’t be if bought out the correct way I’d have that paid plus extra for myself, works out about £15k I would be due then take off the 4K, which has now resulted in him saying he won’t pay child maintenance till all the debt is paid off, I have a lawyer involved so I get my correct amount I’m due but can he refuse to pay child maintenance?