Just calls just about every hour, no messages, how can i make them stop

I get calls from this number also. I do not recognize the number so I don't answer. They never leave a massage. It's annoying as heck

This number calls me every hour and never leaves a message. I called them back and it is credit one bank.

I too received a call didn't recognize the number and called it back. They said it was Credit One bank and the call may be monitored. I hung up, as my payment is due in 2 days and though it is currently over the limit due to the annual fee, my payment will bring me under my limit so I don't feel the need to have them harrass me about making a payment asap! Or charging me a fee to schedule it over phone with them.
I wish they would just leave a message at least saying who they are calling from. I'm not avoiding them...

Call them back endlessly using Google