Baby daddy doesn’t help much...

I had my twins in Jan and since then their father hasn’t done anything but give $150 two weeks ago. He wasn’t there at the hospital, doesn’t message or call, doesnt visit them... nothing. And the only reason why he gave money is because I called his mom and she talked to him...When he finally did (after me asking about it yet again) I was so nice and told him “thanks so much, I appreciate it”, sent him pictures and asked him how frequently it’s going to be happening (I feel like this is a fair question considering it took him almost 4 months to send $150) and he read my messages and their photos and didn’t say ANYTHING (as usual) mind you he has a 6 month old daughter with his gf (we had a one night stand, I was totally unaware of his relationship) and he’s there for their daughter and takes care of her, posts her and him as his display pic on Facebook while these two go totally ignored by him. I’m done sending him pictures of them, it hurts so much that he hasn’t said a word.

What should I do about the situation? I was thinking of messaging him again on Friday (he should be getting paid this week) and telling him $150 doesn’t cut it... I still need help buying better car seats etc... it’s not fair to me or the twins and I’m stressed out tbh.

Any advice? No judgment please