The best way to fight back is do not answer phone calls from numbers you do not know. This includes toll free, unknown and private numbers. If the person calling wants to talk to you they will leave a phone message. If they don't, who cares. Life's too short.
Same as everybody else. I get calls from them around lunch time almost every days. I asked them to not call me and they said I had to talk to the credit card company (?!?!?!!) I complained to the FTC and FBI... Looks like a scam to me - hopefully they can do something about it