I have posted here before and had some great advice. To re-cap, I am mid-divorce from an abusive narcissist after 12 years of marriage. Three DCs.
I was due to collect the DCs from him this evening after taking them to see him after school. I got in the car and it wouldn't start. There has been ongoing issues with the car over the past 10 days and yesterday I was approved a small loan to be able to buy something more reliable.
I phoned him to tell him I was stranded and he said he would bring the DCs home to me. When he arrived he looked under the bonnet, fiddled with a couple of things and turned to me and laughed saying 'you couldn't even manage that?'. I told him that obviously not because I didn't have experience with cars and he made a comment in front of DS about how I was incapable in general. I told DS to go and play with DDs and told the ex that I wouldn't be needing any more help and I went inside.
He followed me in and started shouting, asking who the hell I thought I was, that I was using him to fix my problems. I told him that he offered to bring the DCs home and that regarding the car, whilst I appreciated his help, I didn't deserve the smart comments that followed.
He told me that rather than taking out a loan for a new car, any decent parent would save and get the garden finished to give the DCs a decent home to live in (I must add that the whole house was renovated just 18 months ago, but at the time we couldn't afford the garden. I have since started to do it myself).
I reminded him that I have a 30 mile round trip to school each day (no room for the DDs at the local school so I still commute) and that I needed a car that was safe and reliable. He drives a £11000 BMW and I have a £800 Citroen. He told me that was all I deserved (he bought the car before we split), and that I only wanted to get a newer car to show off.
I then told him that I didn't need his input regarding buying a new car, that I would ask a mutual friend who owns a car garage once he returns from holiday. He said to me that none of his friends would even consider helping me, apart from one (a guy he isn't speaking to), and that I should go ask him for help and a shag whilst I'm there 
I told him to fuck off out of my life and that hell would have to freeze over before I ever contacted him again. He then turned to leave and made some comment about how he has found someone and he was off back to her.
I am angry but more than anything I am hurting. I have no surviving family. My parents are deceased and unfortunately I don't have siblings. I spent 12 years in a physically and mentally abusive marriage, being told his life would be easier if I died. I took the steps to take my DCs out of such a toxic environment but because of my emotional state I still question every decision I make and every step I take. Tonight he has made me doubt everything I am doing once again. I know I can afford the loan. I know the car I'm driving now is clapped out, yet I'm led to believe that I'm being selfish because rather than pay for some fencing, I'm paying for a new car. For him then to say that nobody would be willing to help me, to suggesting I go ask one of his friends for a shag 
I'm only 32 and am trying my damn hardest by my children but I'd be lying if I said it wasn't tough. He can go days without even contacting them yet I wake up when they do and go to sleep when they do because I don't have any other life. What right does he have to make me feel like this 