Not a happy customer. You costed me almost R800 on a R195 debit order

I have a Cell C contract. My debit date is on the 31st of every month. On the 31st of October they debited their money then returned it as unpaid when there was funds available. Cell C then went in a further 6 times resulting in unpaid debits costing me bank charges of R147 for every unpaid debit. I am currently unemployed for over a year now. I receive a certain amount of money from my husband to cover my debit orders. By Cell C doing this i had to pay almost R800 in bank charges and as a result of this I am unable to cover my debit orders. And my main debits is my insurance policies. I want all this money back so that all my debits can be settled. CELL C YOU HAD NO RIGHT TO DO THIS. YOU COULD HAVE CALLED ME AND SAID THAT YOU MADE AN ERROR BY RETURNING THE INITIAL DEBIT/NEVER RECEIVED YOUR DEBIT. WE COULD HAVE RECTIFIED THIS AS YOU HAVE NEVER HAD AN ISSUE IN COLLECTING EVERY MONTH. I HAVE MY BANK STATEMENT AS PROOF THAT THERE WAS FUNDS IN MY ACCOUNT WHEN YOU RETURNED THE DEBIT. PLEASE GET BACK TO ME IMMEDIATELY.