Request for Statements (March 2014 - Feb 2015)

I logged a call with the MTN call centre on the 11/02/2016 (ref.: ***) for the 2014 financial years statements due to a SARS audit. Call was logged correctly, your billing department sent the wrong years statements. When I phoned back to tell the call centre I was told they can see I received the incorrect statements but unfortunately the call was closed and I have to log another call (ref.: REQ***) and it will take 2 - 7 working days. It is now 14 working days and NOTHING YET RECEIVED FROM YOUR BILLING DEPARTMENT. I phone the call centre every other day, I'm being told they are escalating the call to a senior at the billing department and still NOTHING! I am not allowed to talk directly to a manager at the billing department and the call centre can't do anything else except escalating the call (which is anyway being ignored). Is there anybody at MTN which can assist me?