Or is is it just mine? Seriously this man is really starting to get me down now, he was and still is a complete narc, mentally and at times physically abusive. He could go days giving me the silent treatment then be all loving like nothing had happend. He eventually cheated and left, but hasn't changed towards me or our dc in the slightest.
With everything that's going on, he hasn't called the dc once to ask how they are and if we need anything in the house, I mean I'm not expecting much as he's only seen them once this year anyway, but this situation has really got my back up.
He's been lying to everyone for months saying that I have stopped him from seeing the dcs, which I did for a short while as he was starting to show the same signs of abuse to them as he did to me, he would often ignore them and did infact walk past them/us on the street one day with his partner then a week later called them as if he hadn't seen them, this is just one example there have been other things that hes done.
Anyway as he hadn't seen them for months 90% his choice, then eventually asked if he could see them, so we had good discussion and agreed he would start with phone/facetime conversations to rebuild their trust.
I've downloaded skype for them on their iPad, so that he doesn't have to go through me or my phone and he won't speak to them on it.
This week I've had messages from him at random times of the day and night saying I am keeping him from the children yet I have asked him for a schedule that works for all of us so he can resume full contact and hes refusing, he will not call them and expects them to always call him 9×10 he doesn't answer, after he sent me a text @10pm on monday, I was texting him all day tuesday to call as I'm not allowed to call his phone and he ignored every single message and didnt call the dcs.
As everything is very stressful at the moment I went mad and told him a few home truths, which of course he didnt like, now I'm being accused of keeping the children from him because he doesn't want to be with me anymore 
we haven't been together for 7 years and I wouldn't touch him with a barge pole, but both him and his partner are obsessed with the fact they both think I want him.
I'm literally tearing my hair out with all of the stress of It, were all stuck at home and I'm trying my best to keep the dc engaged with school work plus trying to entertain them and he just will not support anything at all, ds also came into my room crying because he thinks his dad is going to hurt me and that hes going to be taken away from me by his dad, if I even mention this to the ex he thinks I've poisoned them against him.
I don't know what to do anymore, it really is getting me down and the silent treatment whilst trying to talk about our dc is messing with my mental health.