Poor service !! Vodacom *****ing my money!!!

First time ever I had my bank account ****med so I had to call Vodacom ten days before the end of the month , asking them to extend my month debits from the 1st of October to the 11th of October. I then get double the amount owed debited !!! I have called Vodacom accounts and customer service 7 times and to be told that’s what happens when you extend your debit date you get double debited and not refunded!!! NO ONE TOLD ME THIS when I requested the delayed debit order. I thought I was being a great customer instead of leaving the account to bounce due to the ***** experienced!! Vodacom are always out to Rob any customer when they can. I was ****med by a Vodacom sales representative this year already. And when they listened to the voice recordings they agreed I had been ****med and NOW AGAIN being ****MED. This is unacceptable