Worst Customer Service Experience

I have never in my life had such bad customer service. Account balance R0.00 as per last statement and then they debit my bank account with R2500 that NOBODY at MTN can explain why. Subsequently my account gets suspended and now I am told i owe R4200! All you get when you call is automated responses, NOBODY wants to assist. I am reporting this to ICASA. Worst customer service ever