Waiting for sim swop for over a week with no helpful help from Ismart

I am waiting since last week Wednesday 30 August 2017 to date for a sim swop. I have called on numerous occasions daily to check on the status of my sim swop as well as find out why this is taking so long. No one was able to assist in resolving the problem and when I ask to speak to the person that can actually help and action the sim swop, there is no one who can help me. The customer care agents tell me the same thing constantly which is that my request has been submitted and they dont know why it is taking so long. I dont know what else to do and this is becoming very frustrating as I cant get Cell C to help as this is a contract phone. I sent emails for assistance but no one is reply since the only reply where they asked for my ID number. I rep**** with my ID but no reply since then. It is taking over a week and still no sim swop. What do I do. I am concerned that something underhanded is going on as my sim swop has not been done, the airtime that comes with it is renewed on the 08th of every month so the airtime for the August into Sept will simply fall away. I am starting to think that maybe they want to stall until the new month. Unbelievably bad service. An entire week and no help from them just the repetitive response. So sick of it. Wish I could get an answer/resolve.