David Cooper Better Business Bureau FLSU

someone from the Revdex.com flsu by the name of david cooper #598015 is contacting me and saying that I have an outstanding loan with cash advance usa. he will not give me a phone number or an address and only wants me to pay this by means of a money gram etc. I don't understand why if I owe this that he would not give me his address and phone number and he can not send me information in the mail so that I may review it and decide how to best repay this if this is truly mine which I doubt that it is. I don't understand why he is telling me that he can only do business by email if he is truly with the Revdex.com in the state of fl. please advise me as to how I should handle this?