OVER BILLING MONTHLY

Mtn has been billing me over since I upgraded to a new Contract March 06. Nomonde Contact centre I reported this matter to her and I was promised on 18/5/2015 that the query takes 5-7 days INVAIN TILL NOW. Went 2weeks again to the outlet in GEORGE W/C & still I was promised that Thabisa would give me a call on the 6/June . The initial contract with them is suppose to be 839.00,however every time I make a payment within days ANOTHER NOTIFICATION CONES YOUR ACC IS OVERDUE...I AM TIRED OF GOING BACK AND FORTH TO THE STORE AND I WANT MY MONEY BACK AND AS FAR AS THE QUERY WAS LOGGED FROM THEIR NOTES THERE WAS NO RESPONSE EXCEPT THAT QYERY CLOSED WHICH WAS ESCALATED TO INGA WHO DID NOT REVERT BACK TO ME NOR ANY ONE FROM MTN GAVE ME A CALL I NEED MY MONEY BACK AND THIS IS DAY LIGHT ******* IT SICKENS ME BECAUSE NO OBE WANTS TO RAKE THE QUERY NOT EVEN THE STORE MANAGER WOULD WANT TO GIVE TOU A FEEDBACK.. THIS IS A SERVICE THAT YOU GET FROM MTN WETHER ITS THE CONTACT CENTRE OR THE OUTLETS ITS TINE THAT YOU GUYS DO SOMETHING ABD STOP BILLING MY ACCOUNT MONTHLY AND I WOULD TAKE THIS NATTER TO OMBUDSMAN GOING FORWARD ..