Strange debit on account and poor service

Good day<br> I paid my account I***-1 per debit order 1 April 2015 but according to statement dated 3 May 2015 an unknown balance brought forward of R335's dated 4 April 2015, 3 days after my account was clean. My account balance is now R335 too much. I can't stop the incorrect debit order going off at the end of May.<br> Vodacom promises on the back of the account \Send an SMS to...and your query will be attended to"so I SMSd the whole story to you on 23 May 2015 but nothing happened. Vodacom's not calling me back nor reading my complaint. <br> Furthermore"