customer for 10 years, vodacom give worst service

I took my phone in for repairs they neve, a week later when I phoned they said that they (the manager Daniel) couldn't find anything wrong with the device he then transferred me to the technition (wernich) who also confirmed that it was only a software problem. Daniel said that he would hone me back and he never did. The next day (a week after my phone was booked in for repairs) I went to colllect my phone and when I looked at the phone the keyboard were still not working, I asked the lady who assisted me if she can call the manager or technition and there were not one manager in that store. I then asked her straight if they worked on my phone and she said no they did not do anything to fix it. I then reported them to vodacom tygervalley their head office and after 3 days they still haven't give me any feedback after I demanded on a sealed box, brand new phone because at the end of the day I pay them and I expect a new phone after that same phone was repaired 4 times in 2 years. According to the CPA law, I have the right to demand a new device. I am a customer of vodacom for 10 years and this is this is the type of service that I yet.