Incorrect billing dates

I took out a contract recently and arranged for the debit order to deduct on the 27th of each month. The 1st payment was deducted on the 23rd of August and bounced because there was no money in my account and I was charged R60 by my bank for this. I made an arrangement to pay in cash at a store but was told by the store that they usually deduct on the 3rd so I shouldn't pay and wait until that date. Nothing was deducted on that day so I withdrew money so I could go to the store to pay in cash the following day only do have Vodacom try to deduct thee following day and it bounced again. one again I was charged R80 by the bank for unpaid debit order. I want the banking fees I incurred for this to be paid bank and I want the debit order date that I arranged to be put in plan or cancel this contract immediately. The contract is over priced and I haven't even had the contract for a month to be having such problems. This is unacceptable.