Payment confusion

I called on the Clearwater branch (both) where I had to spend almost 2 hours just to update my contracts and take out an additional one. When I received my statement on the new contract, I picked up an additional charge whereby I called the call centre. I was told of the R110.00 activation fee which was never explained to me in the store. This is rather unsettling as I did not get a fair chance to make an informed decision as a customer. As a company you have no right to process debit orders with increased amounts on my bank account. I did not authorise for this payment to be made and would request for it to be either reversed, or the contract cancelled. Secondly, the new contract was added to the incorrect account. I was told by your call centre that I need to go back to the store to have this corrected. Needless to say that this is not going to happen. Please ensure that my debit order details on my contracts are as per my contract that was signed with MTN for the past years, alternatively all debit orders will be stopped on my side and then the company can run around to get payment from me due to the muck up being made by them.