They claim to be credit services, a clearinghouse for all credit card companies, to give you a better interest rate.  I kept pressing the person for information on which company, which credit card company.  I didn't let her ask any questions. I then stated to her that, "my number is registered as a do not call, that she needs to remove my number from her list.  I am then filing formal complaints with AG's, office, WIBBB, FCC, etc."

She did manage to say at the end of my lecture, "I can't help you there."