Account debited after "Card Error" online booking

I booked with Woodford Car Hire online. Entered my credit card details and clicked "accept/enter". "Card Error" came up. Reentered twice more, then with another bank's credit card. "Card Error" came up three more times. No card verification eg PayPal. Checked my accounts and the cards debited. I phoned Woodford and cancelled the reservations. After numerous emails and phone calls, two weeks have passed with no full credit to my credit card account or response/reply from the Woodford Finance department. Very unhappy client.