Disgusted by CELL C

So I wrote a review in February and again in March and ever since I have gotten this contract, everytime the phone asks for an update, after the update all of a sudden the sim car which was working says sim not registered and sim damaged. How is this possible. Now for the SECOND time I have to pay for a sim swap because several people I have spoken to at Cell C customer care told me to take out the sim card next time it asks for an update, I have never heard anything like this before. If this is the case then Cell C phones need to come with a warning. The contract is not cheap and I refuse to go through this **** everytime the phone needs an update and then I have to pay once again for a sim swap. Money does not grow on trees for me and the worst part is that cell c customer service is useless. I have sent out a mail on 20 July since my phone now did the same thing after the update on Monday 19 July 2021, I still have not received any feedback whatsoever and I think for such a big cellphone contributor it is unacceptable and truly disgusting. I was even told by one of the cell c customer care ladies that they cannot assist me any further. I expect a full refund for both sim swaps done and I expect a new cell phone device as there is clearly something wrong with the device. I also expect a team leader or manager to contact me because I cannot deal with people who do not want to work there and who are helping your customers. I spoke to a lady Dudu and her attitude was as if she is just giving up and its oe here and ah there, barely even words spoken just a really bad attitude