***** invoice ME2U money transfers

I am so disappointed in MTN disgusting service. I have been ****med out of R3628.16 from my account. I have a debit order for a contract of R319.00 per month, suddenly I receive an invoice via SMS regarding transactions totally the above amount, invoice says ME2U money transfers, I have never ever made any thing like this !!! This is unacceptable, I am a pensioner and cannot afford to lose that amount of money from my account, my debit orders will all bounce!! Trying to contact someone with MTN, to sort this problem out, is just about impossible. All the numbers are only voice mail, replies. Even the ***** dept. does not answer calls. I have been into an MTN branch, they said they would call me back, after, I did an affidavit etc., regarding the *****ulent invoice, I've heard nothing !! However they took the money from my account, the bank did reverse it, but now I am concerned it will happen again next month. I've been reading all the complaints of people that have had the same experience. Surely the accounts dept., would pick up an unusual transaction like this !!!! Can anybody assist me with this ??? Who can I contact that will answer a phone call ???Do you think its worth reporting it to the police, as MTN are *****ing money . I would never recommend anyone to take out a contract with MTN. regards DH Killerby