Disgraceful lack of service

I have a data SIM from Cell C, I have had this for several years now. At the beginning of February I found that I was unable to access my data on my Huawei mobile router. I went to the Cell C office in the East Rand Mall to clear up the matter and was told that the existing SIM card was "too old" and the would have to do a SIM swap at R 116-00. I agreed to the SIM swap, was issued a new SIM card and was told to put it into the router after three and a half hours. I duly did this but still no joy. I went back to the Cell C office in the East Rand Mall and after much fiddling I was informed that the SIM card was "damaged. (New SIM card out of the original packaging damaged?????). All they could do they said was to give me a non-ricad SIM and I would then have to phone Cell C customer care to sort it out. At this point tiring of the lack of assistance I lost patience and demanded that as a Cell C client for over 15 years they sort it out immediately. The senior person, a woman then gave me a new SIM card and said to put it in the router after three and a half hours and if it didn't work to phone the branch to sort it out. After the three and a half hours I duly inserted the card, and once again, crickets. So, I phoned the office in the East Rand Mall as instructed, spoke to a lady (who may have been a different person) and complained that despite the SIM swap i still could not access my data. She asked me for my data SIM number which I provided and then told me that "NO SIM SWAP HAD BEEN DONE ON HA NUMBER ON THAT DAY. If this is how Cell C treat their loyal customers heaven help those just joining their network!!!!