Enterprise Rent-A-Car

I had a company rental with enterprise that was arranged through insurance and pre-authorized for payment. I reluctantly provided a personal debit / credit card to the Branch Manager Kurt Stephens who assured me it would not be charged and that it would only be kept on file. I looked the guy in the eye and said, "YOU [Enterprise] ARE NOT AUTHORIZED TO CHARGE ANYTHING ON THIS CARD. I'M TRUSTING YOU". Over a series of days, my bank statement reflected at least four (4) different unauthorized and/or fraudulent charges from Enterprise that they have still not refunded two (2) months later.