Credit Card rate reduction robocall

Here is the number for the FTC complaint line. If possible sound interested and see if they will give you the company name. Or tell that you are busy and see if you can get a return phone number and extension and tell them you will call them as soon as you get off the other call. The go to this address https://complaints.donotcall.gov/complaint/complaintcheck.aspx

File the formal complaint with the information they give you.

Hope this helps ;-)