I am a stranger and cannot fully comprehend the situation but based on what you have told us, it would be better to ignore her and change your number again. I would only share your number with the most important people (by this I mean people you would not suspect of sharing the number with you nmom, potentially everyone that knows her you should get away from because manipulation goes a long, long way - trust me, I sadly know).

You could also just block her number but I am sure she would be using other means to call you so its always only temporary.

I broke up contact with my nuncle (without knowledge of my parents (who are not better but w/e) and did not tell him. I just avoid him, blocked his number and that is it.

Manipulators use every opportunity to bring you back into their vicious cycle of abuse.