incorrect billing

I would like to lodge a complaint with regard to the quality of service I have been receiving from mtn.<br> <br> On Saturday the 20th of June while working I depleted my recurring monthly bundle and instead of being cut of mtn billed me for PSD a service that I understand is not part of my contract. I then purchased 1gig Top-up only to realize that the 1gig I had purchased was now appearing as an amount due to me under PSD and I was disconnected.<br> <br> This is just one of the many issues I have and walking into an mtn store the attendants tell me they cant do much my question is but im paying for a service whether their staff is on strike or not the quality of my service should not be compromised just yesterday my connection was cut to my other number as I apparently owe an amount to mtn and yet my issues havnt been addressed I logged query personally and at one of your stores. <br> <br> Please address the PSD issue as I can not be paying for I service I didn't sign up for and I look forward to a refund by the way. The livechat service is down it seems. <br>