Breach of Contract and Billing Account Issue

Chubb, you have been taking off wrong amount off our account each month, you take off whatever amount you feel suits you. You then had the nerve to tell us we were not paying and removed the transmitter box for not making payments but we have bank statements to prove payments where made every month since our contract has been signed. Payments are also taken off at wrong time each month it differs, now what part of the direct debit date are you missing as to me this should be same date every month till end of contract. Since removing the box 2 weeks ago, you go and deduct R1000 off our account who gives you the right to do that. I demand refund ASAP and i suggest you get your customer service team to answer your phones and also inform your staff why our debit orders are the way they are as no one seems to have an answer, well my answer is refund our money . Look forward to hearing from you!!