No Feedback or any assistance from Cell C

I have been on my current Contract ending 31Aug. 4 months ago I received a call for a new special running 10g Day + 10G nite R199. They sent me a new ZTE wifi device with a new sim immediately telling me that I must use this device from when received. Only also to learn a month later that the new contract on this device will only be effective from 1 Sept, but I just left it, as this was not what was said to me in the initial call. I got to learn this because as soon as I switched on this device my data was finished. I thought the device was broken as I had to send it back for repairs. I was then told that it was not the device but my data was finished. I thought it was strange that my data was finished cause I had a lot of data but left it. The next month my Data was finished within 5 days (keep in mind my data always lasted me a month, never before about 2days before the end of the new month). I logged this again and was told that they cant give me feedback until the month is over. The next month a logged got the report and escalated it and again phoned with another complaint as my data was finished again, never received that feedback. It has been going on as such for 4 months now. By which I also advised that I want to cancel my contract and not renew. NO FEEDBACK. I called Cell C cancelation and they informed me that the contract will not renew. 30min later the first phone call from cell c, only to let me know my cancellation was declined as I have the device (good sales trick). From there I was on the phone from 9 to 11 being sent from pillar to post, cancelation - Collection - Cancelation- Customer Service - Manager - Accounts Dept (no idea why the manager put me through to them) - back to cancelation. From there I just hung up the phone as this was a complete 2 x 360... waste of time. I have so many ref# and each time a phone they log a new request, meaning that my old ticket just disappears. The Technical department has also sent this to dispute ********** 463 for June usage. No one is prepared to take ownership to run a history report and compare from where the problem started to assist. I just get told that is it my laptop and cell doing updates..... but this was never a problem before. Large Data usage are in a matter of seconds apart. I am going to open a case of ***** as I am paying my account but not getting what I am paying for. Cell C is very quick to take my money and get me into a contract but not willing to do anything about my concerns. Ref# ********** 055 - ********** **********