MTN does not respond to reported *****.

Someone has used my SA ID to open a ********** account with MTN and I am now being billed for this account. The account was opened at the Balfour Park MTN store. 3 weeks ago I informed MTN ***** department and their customer care department of the situation. I have also opened a ******** case. I have sent them all the necessary documentation. To date, I have received NO response or assistance from MTN in cancelling this account and I continue to have money debited from my bank account. What incredibly poor and unacceptable service from MTN. Why do you not respond to a reported case of *****?