Hogan & Weinberg

I know they are a scam but how do I get them to stop calling me? I get several calls a day, I block their numbers but sometimes they call my parents looking for me. The last time they have called from 1-443-478-3961 and requested i call a 855 number. The first time i called i told them they are not legit and i need proof if i owe a debt, he threatened me and hung up. Do i just need to change my number? If i change my number how do I get my disconnect my association with my parents house number.