Who called from 8586335631

Caller wanted to know if we wanted to paint our house.

Have received calls several times over the last week and everytime I answer they hang up

I'm sick of all these contractors violating telemarketing laws.  Here is their information:

SUN COAST REMODELERS
9163 CHESAPEAKE DRIVE
SAN DIEGO, CA 92123

858-633-5633 Office
877-811-3151 Fax

License # 938417

They call here at least 2x a day & when I answer they hang up. When I call the number back all I get is a busy number. How do I get them to stop calling without calling my service provider and blocking the number?
Thanks!