MTN has no service for clients

Last month i received a statement with crazy figures. 29th I went to mtn store in northgate to query. Spoke to Tracy, she said she lodged the query and she will call with feedback. 30th no feedback, i went again this time i payed my usual monthly fee and asked for mtn banking details of which she said she doesnt know them but she will call me with. She also said she hasnt received feedback regarding my query, she will call me the very same day and also report to her manager if she still has no feedback. I guess that was the way of moving me out of her face.Seems like mtn employees are not trained and dont have client service.How can you fail to help the client with banking details and still do no follow up! 31st still nothing, then i phoned call centre, spoke to Lee. Stated my problem and also she said she lodged the query and gave me reference. NO FEEDBACK TILL TODAY. I then drove all the way to 14th Avenue, wasting my petrol and time. Why? IS IT BECAUSE THEY HAVE NO EXPLAINATION, OR THE MATTER IS NOT IMPORTANT TO THEM OR THEY DONT NEED MY MONEY AS WELL AS CLIENTS. WONDER IF THE MANAGERS HAVE ASKED THEMSELVES WHY THEY LOOSE CLIENTS.