Worst customer service, Run from MTN ,only care about money

Im very unhappy with MTN and how they handling my query, I pay monthly subscriptions every month in time never missed a debit order for almost 10 years now and someone tried to do ***** on my account and i phoned mtn immediately they confirmed that limits were increased but did not use anything and they will decrease the limits.Everytime when i phone to follow up thy said the query was sent to billing they have to do manual adjustment that was in april ,Now when i phone they saying the query is with *****, they debited my account R3295 when my subscription is only R400 ,I reversed R3295 and went to mtn store and pay R500 cash .

Today MTN suspended my line becouse im in areas, How can i be in areas when they still investigating a case.Now my credit score will be affected. I speak to different mtn champs every day who cannot assist ,