Ex-in-laws block me during visits

AITA for saying that my ex in laws need to unblock my number while they have my children

if they want to take them anywhere? I 35f separated from my partner 42m almost two years

ago. We have three children together ages 15, 8, 7.

A lot has happened from then and until now. Without getting too much into details

I'll just say there are criminal charges and safety concerns where my ex is concerned and I have sole

physical and sole legal custody of all of my children. My ex is court ordered no contact with

my children. The problem arises because his family wants to have relationships with my children

which is fine as long as they respect me as the parent. However, that is not what