If you do ask them to stop calling you they just hang up on you. They call my business 5-10 times a day. The more you answer, the more they call. Don't answer.
I just keep them on the phone for as long as possible when they are repeat callers. Ask tons if questions go through different scenarios ask about how they are better than the competition...
Time to them is money and it also affects their performance numbers especially when you do not buy.
About the only way to get them to quit calling... Takes effort...
The fact that everyone here getting called by this number shows that there is a high posibility that is someone trying to tell you to pay your debt, hahaha.