No account with Vodacom but i get charged

Each and every month I have to battle with Vodacom to reimburse money they debited form my account and worst of all I don't even have an account with Vodacom. We bought a business and the previous owner had an business account - Vodacom confronted us and said it is ********** to continue with the account I sent Vodacom an email to change the contract and or to stop it because we had no knowledge of this account and they started debiting my personal account!!!! its been on-going for several months and each time they deposit back the money but still I don't have an account!!! and no one can obviously assist me each and every time they say its been fixed but the next month its there again and this month the amount of R1287,98 was deducted HOW IS IT POSSIBLE!!!