I just block them all. lmao, I know when my credit card payments are due, how much I owe, and to whom I owe money to. No need in calling 15 times a day. So, every number that calls me, that I don't know, that continuously calls, will be BLOCKED!
this # shows up as UNKNOWN and has been showing up on caller ID 18 time in one week, even on a Sunday and also after 8:00 PM Central time during the week.