Got 3 calls today with no answer...  I'd love to know who the hell it is!!!

got a call from this number all week and finally was able to asnwer today.  This person said they were calling form Utah but the area code was a central pennsylvania number.  Asked me age, marital status, and what credit card i used.    no identifying information.  Was trying to sell me magazines.

got a call..but I missed it..left no message

How do I get them to stop calling?