Ex emotionally abusive boyfriend

I’m trying to break up with my emotionally abusive boyfriend, and to do so, i need to block him.

My point is, he’s already blocked but keeps calling with a No Called Id format and I can’t do anything about it except change me number. He’s already told me that no matter what i do (i.e change my number) he’ll find it. I’m too scared to see if it’ll happen so I wanted to ask you guys if it’s possible for him to get my new number? (My close friends and family will not be giving my new number away)

(I don’t know where to post this)