Was overcharged by R406

I was overcharged last month by R406 on my Telkom mobile account.<br> <br> I have called in to the call centre 3 weeks ago and still have not received feedback. I was told within 72 hours.<br> <br> I also asked to speak to the manager and Khanyi would not allow me too.<br> <br> Case number is ***5.<br> <br> Please help.