Keep getting these calls twice day

JC.  That was the old phone number for Rosemarie Collections.  Unfortunately, the number was "spoofed" (google "mobile phone spoof") and we had to change our number.  We were getting hundreds of irate calls each day from frustrated consumers.  According to Verizon these spoofs are often done by offshore crooks who are attempting to gather personal information.  While the phone number looks like ours and the callers represent themselves as "ADT" they are not either......they are crooks

Have received these calls for over 2 months now.  Finally just blocked the number.   Did call Frontier and they said it was probably a scam to get info, such as address.

They call every day. No one speaks then it hangs up. I am tired of all of these call every day sometimes more than once a day.

I called this number back and a recording stated the number had been changed or disconnected.  Huh?  Sounds like someone hacked this number.  I would report to phone company, but have no idea where to begin.  I would think the carrier would have an interest in finding the person stealing their phone numbers.