Who called from 2107143539

I received a call from 210-714-3539 and the guy asked if I was "My Last Name" and I said yes, and he hung up. So they're not selling anything or offering, they are just gathering information for whatever purpose and when you call back they're unreachable. These are allegedly CRIMINALS, whichever is their purpose. I believe the trouble is coming to their house very soon.

https://www.zauba.com/company/WORLDCOM-MULTI- ... DL1995PLC066369

Just received a call from Worldcom Multimedia 1 21 714-3539, telling me the warranty on my truck was expired and would I like to renew the warranty.  I told her (English speaking) NO!  Her next question was "Is there any particular reason you don't want to renew?"  
Me:  Yes, I don't want it, period."

Worldcom:  she hung up!  

Good

I have received 3 calls from 210-714-3539 since 15 Sept. 2014. Calls always go to answer machine and they hang up. Filed FCC complaint.

I continue to get calls from this number for the last 2 weeks at least once or twice daily.  How do I get rid of them.