What if my ex-boyfriend has a new girlfriend but doesn't pay me back?

If I were you, I would definitely ask. I will call them every day. I hate them. He owes you money. Why do they feel so arrogant when they owe money? Why do they suffer such a big loss? Go to his home to find his parents and make them better. Now everyone in this society really has it. Still so confident. Is he still not a man? If not, you can find a recorded phone to call him. As long as he admits that he owes you money, you can sue him on this recording without an iou. It is better to do so. You can also send a short message and save it to sue him, but I think it's better to record the phone. I hope my answer can help you, and I wish you get back what belongs to you as soon as possible.