Did some further research on this scam:
Cardholder Services, A.K.A. Account Services, Merchant Services, Credit Card Services. Possible address: 2202 Curry Ford Road, Orlando, Fl. 32806. This may or may not be current. One online poster claimed that state investigators trying to track down these sleazebags found an empty building instead. At least several posters think they may also be connected with United Debt Solutions, 1567 Kingsley Ave, Orange Park, Fl. 32073 (Possible phone number: 904-541-3081
) This company is an eighteen-carat fraud-mill and currently under subpoena by several state Attorney General’s departments. If they are contacting consumers under “Cardholder Services“, it is almost certainly in violation of a restraining order as well as numerous state and federal statutes. The list of consumer complaints and rip-off reports on these scum is almost endless, avoid them like the plague!