Okay so this will be a long one but please bare with me..
I split with my sons dad 10 months ago, after 5 years together. He wasn't the best dad whilst we was together and took the break up pretty hard (dv relationship).
His parenting got better after we split thankfully as I always knew he had the potential to be a brilliant father, but he was never the best at paying me for his son. When we first split we didn't get on too well and phoned child maintenance and after going through everything with them, and him proving his earnings they said that he'd have to pay £167.90 per week!!! I didn't want that, so we agreed on £50 per week, paid every month on the same date. He completely ignored it for the first few months, and kept telling me he'd pay next week, next week would come, and he'd say the same. Now I know I should of went back to cm and got it paid through them but I was trying to be fair. There's been a few times he hasn't turned up to collect his son, and then I found out he was doing cocaine. Still trying to be reasonable I went and spoke to him, just him and I as he had been promising he hadn't done it anymore, well being together for 5 years I thought at least speaking to him in person, I'd know if he was lying to me and if he was on it then. I partially believed him and agreed he could have our son if his mum was there at all times and he didn't take our son out in the car. Allwas good throughout Nov and dec last year, picked him up and dropped him off when we've agreed and paid cm on time. Now about 3 weeks ago he found out I'd been seeing someone else, and everything changed. He hasn't paid his cm, keeps telling me he'll pay it next week. We're not allowed any contact directly so it has to go through his mum as he was arrested for harassment and stalking a week ago as he was watching my house, and I had like 100 phone calls and messages everyday. On Sunday he text me (breach of what he's meant to do) and I phoned his mum, apparently I'm being unreasonable and I don't understand how hard it is being a single parent like her son
.
What do I do next regarding cm?? Do I wait and see if he does pay this week or am I being naive and I should just push through with cm? He said he's not been paid from work but yet his mum has told me he has been 
. Please help.... 