Deducted more money then they should

I can't even give them a star but needed to otherwise I can't complain. They were deducting an amount with a debit order every month. I kept on sending them email to here what my outstanding amount was. But never got an answer from them. In August this year I contacted a very helpful lady that checks your credit score for you and if you own someone money she gets the amounts and paid up letters. She then contacted me and said that I have no debt om my name and send me a letter that states that one no one money but still these people were deducting money from .y account every month. I tried to email *** them several times and calling them but till now with no success. So how much money are the ********ly deducting money from our bank accounts every month and you can't even get hold off them to get a statement. I personally think they are the biggest *****s in this business. I took that letter to my bank and they stopped them completely from deducting money from my bank account