UNAUTHORISED DEBIT ORDER

I am not a Vodacom customer and never have been however for two months now I have had a debit order go off my account in respect of Vodacom. I have to constantly contact my bank to reverse and stop this debit order yet it is still being deducted by Vodacom. I have tried to call Vodacom to query this and ask them to remove this debit order but there does not seem to be an option to speak to a consultant on their customer care number. I have also sent a message to Vodacom on their Facebook page and have not received any response. Can someone from Vodacom please contact me so that this can be resolved. This is poor service on you guys end if you do not even have a designated team to attend to these type of issues.