********** Service from Vodacom regarding ********** upgrade!

I have received such ********** service from Vodacom after being very a loyal customer since 2015. On 13th September 2018 my bank account was erroneously debited by Vodacom, when I contacted their Call Centre I was informed that my contract had been **********ly upgraded and I was advised to email their ***** department for resolution. The ***** department was subsequently emailed and the relevant forms were completed and mailed back to Vodacom on the 14th September 2018. To date (16 October 2018) I have not received any progress feedback on the ***** investigation although Vodacom acknowledged that my contract was **********ly upgraded . I have forwarded numerous emails and have been sent from pillar to post by their *********** call centre agents without resolution. To make matters worse Vodacom has continued to debit my bank account. This is not the type of service that you would expect from a reputable company like Vodacom. Can Vodacom please urgently resolve my query, reimburse my money and subsequently cancel this contract!!!