I'm having the same problem with these jerks, they call up with their "scary" credit card scam, and when I tell them I don't have a credit card they get highly abusive and start calling me back on multiple other numbers with only the intention of continuing the abuse.  So far they've harassed me using 941-312-8878, 720-201-1682, 720-201-1849 and 720-272-6670.  Those numbers are in Sarasota FL (941) and Denver CO (720) yet it's the exact same woman who has been calling me.