Overcharge

Hi there,<br> I have been very patient with MTN as I understand the strike-related difficulties you have been having. My response from customer service email has been non-existent. I had to find my credit controller's direct number, but she is not answering.<br> My average bill from December 2014 to April 2015 was R700. Subsequently, this is what my bill looks like:<br> May R5227<br> June R4226<br> July R5616<br> August R5227.<br> The only answer I've managed to get from your helpline is that my data usage is high. This is unacceptable, and I can't keep on paying for your incorrect billing. Please advise how I am to proceed.