Double Debits

I changed jobs recently and my salary date changed from the 25th of each month to the 1st of each month.<br> Having slipped my mind that my debit for Vodacom was set for the 28th, my debit unfortunately bounced and I was penalised with a R100 fee. I accepted my fault and went to a Money Market pay point where I paid in full. I then contacted Vodacom to change my debit date. The earliest date I was told I could choose was the 8th which I agreed to.<br> The next month however I paid at the same Money Market outlet on the 2nd, before my debit order schedule. I was then debited again and charged once again a R100 penalty.<br> I contacted the accounts department who said I could set my debit date to any date that suited me and was told that I must just pay.<br> I asked to speak to a supervisor and was told that the supervisor was in a meeting and would contact me back, which has not happened.<br> This month however, I've been debited multiple times to the point that my bank account is now in arrears.<br> This is unacceptable!