My ex got the twins (6 years old) because I got bad depression. I was seeing them for a while but it was very hard to get better and sort my life out while seeing them. It hurt knowing they where becoming someone else & being raised by his mother & his girlfriend at the time made it hard. He moved, we lost contact because my phone broke & things happened, but I started to get my life together so I called him we spoke sounded promising. I kept calling and he ignored me so I called him about two years later completely better. I have a 4-month-old now so I called him, sounded promising again. Then after a few texts he said he needs time to think about it & now it turns out they call his now girlfriend (not sure if it's the same person) mum. Do I have any chance under family law of legally seeing them ( custody of children)?