Refusal to refund a double payment taken.

Tempest took a payment from my debit card before telling me that they could not accept international debit cards, so I paid with a credit card. They then looked me in the eye and told me no payment had actually been taken from my debit card. Two days later when I discovered this was untrue I took half a day out of my holiday to drive to their office to sort this out. Whilst they did acknowledge a double payment had been made they were infuriatingly pathetic when it came to being refunded. this international, multimillion company made out it would be impossible to be done there and then...(Thank you for wasting half a day of my vacation). After leaving my details they then failed to contact me. When I got back to them they then told me they needed different details, further emails told me they needed my passport and driving licence scans, so to cut a long story short, they took my money, then made me jump through hoops, showed little concern for the huge inconvenience caused before failing to lift a finger to refund me. So basically corporate theft. I would avoid this firm...like the plague.