Ollo Credt Card Company review: Unauthorized charge I charge 50.00, gat a bill for $500

I went to Krogers in Cincinnati on July 3,got a few items. I got my ollo card bill at it was 500 charge. I did not have my receit , but I know what I brought, and it was not 500 worth. I called the credit card company to disput the charge, they did nothing, but wasted my time. They are charging me for this bill, and reporting this to the credit bureau. I would never dispute a charge if I made the purchase.