***** on my account not sorted out after 2 weeks

On the 7th October a sim swop was requested on my account, by a VODACOM EMPLOYEE without my consent. After phoning 4 times speaking to various consultants, who ensured me that the sim card has been blocked and could not be used any further the ********* used the sim card and chased up the account to almost 7 grand. I went into the vodashop on the 8th October, I was even the 1st customer where I was informed that I needed to do another sim swop ( which I even had to pay for) and then inform the ***** department what had happened and they will assist me withing 48 hours. I informed the ***** dep and received emails they are trying to contact me, after I sent 3 emails with the correct nr, no one has still contacted me back. Vodacom will receive NO PAYMENT from me until this has been sorted out. I will appreciate someone phoning me back regarding this ASAP