CBA- horrible service and accounting mistakes

We have been renting office printers from CBA (Cape Town) for almost 5 years, and we had problems from day one. CBA is the only supplier who insists on payments via debit order from our account, and time and time again we were debited the wrong amount - sometimes more than double the amount we were invoiced for.

When it was time to upgrade (they set up their contracts in such a way that you are forced to upgrade after a certain period to a more expensive printer, or they raise they per copy rate ridiculously high), we negotiated for weeks. Our concern was the payments, since we (1) didnt trust CBA's debit order system to debit the correct amount, and (2) we couldn't afford a double rental anywhere during the switch between the two contracts. We were promised over and over again by the sales person that this would not happen, and when received our invoices, we were relieved to see that were were indeed not billed for a double rental.

HOWEVER ... the first debit order went off with a tripple rental!! Not close to the amount on the invoices. CBA cleared our bank account resulting in all our other debit orders bouncing, and quite a few pentalties. We reversed the debit order at our bank and put the debit order in dispute to try and sort out what happened.

Since then CBA's accounts department has been rude, evasive, unhelpful, to say the least. They keep sending us invoices we were not billed for, demanding addissional payments for this and that, not giving us real answers for what were are being billed for. Also, now they refuse to provide our printers with toner until all these invoices are paid.

We are stuck and the communication is extremely '*****y' from their side. Trying to negotiate and sort this out has been a nightmare. We should never have stayed with CBA, and I will never recommend them to any business. STAY AWAY!!