Who called from 6236963737

This is Suddenlink Cable company calling to try and get us to upgrade our service plan.  The caller I'd just comes up Arizona.  They have called many times a day for a while now, was home and decided to find out who it was.

The person from this company has called the house, daily for the last week.  They
do not leave a message.  

Is there a way to be removed from their sales list?

No message. They call, machine answers, the hang up. cid displays VArizona

Call at 231PM today.  Caller ID said ARIZONA.  Since I don't know anyone named Arizona, I didn't answer.  They left no message.

623-696-3737 just called again at 1057AM on Saturday morning.  Caller ID again said ARIZONA.  I didn't answer, they left no message.