Double deduction on a car warranty

I bought a car warranty for my Audi A4 with Motor Engage which is part of the Innovation Group. I got all documentation as promised. However, two debits orders were made instead of one. I called, complained, sent all the documents I was requested to send but nothing was done about my refund. I even got tired of complaining. I just realized that motor engage does not take their customers seriously and I'm no longer interested in their service for I foresee a whole lot of problems in the future. If they can just help themselves to my bank account just like that and even fail to resolve the issue it means they can't be trusted with personal information.