Well there is nothing you can do and it's really their problem of not understanding what they were doing.
Unless you want to waste your time, I suggest to effectively gain everything possible and leave them alone.
It's already kind of insane that you have to ask someone on how to have conversations with your dad or other family member.
1
1
As a starting point and a proof that you can be a good father, you have to send 200$ to soleil every month
