Account Debited after it was cancelled

I went to the Gym company on May 21st 2015, was received in the accountant office and Gwen the Accountant processed my cancellation details. I paid R340 for the cancellation fee which included the remaining months of the contract and also the November levy fee. Since it was after the 20th, I was still going to be debited for the month of May on my account, I was fine with this, Gwen assured me that all is cancelled and I should not be debited in June, I actually asked that what if I see a debit order going in June, she said that will not happen. Just when I was about to sleep on the 30th June, boom and SMS from my bank about the GYM Company debiting my account, I don't know how many times I cursed, I probably dream doing bad stuff to Gwen as I went to bed very mad. I called in today, only for another accountant to tell me that Gwen never filed my cancellation papers with the \Administration". I don't see myself wasting time with these losers any more"