In XXXX 2014 XXXX issued a phone number to me for new smartphone. A few months later I began receiving calls once or twice a week from XXXX in XXXX, NC. The calls are continuing. From online search I found info that says this is a debt collection agency. My phone number is on Do Not Call list but it says that debt collectors can continue to call. I have never had a debt problem. No reason for them to call me. Is it possible that someone else with a debt problem had this phone number before me? How to make them stop calling?