3 Sim Swaps Later with no solution to my issue

I've been a Cell C client for the past 12 years (8 years as a contract customer and the last 4 years as a prepaid customer) and since early July this year I've been experiencing an issue that even the Cell C staff seem baffled by but are not willing to find the root cause of the issue and resolve it.

One morning around the 4th July 2021 I woke up and noticed my sim card says No Sim | Emergency calls only, I contacted Cell C call center later in the week and was informed my sim card is damaged. I explained to the agent I don't ever take my sim card out so how is that possible she says she cannot give me a definite answer I will need to go to my nearest Cell C store who will have to check and possibly do a sim swap. So due to the rising Covid numbers and unrest at the malls in July I was only able to get out to Cell C Southgate the 4th August 2021. I did the sim swap the lady at the store gave me the explanation that sometimes when you update your phone the sim card damages (How is this possible as the updates are required to ensure the phone is running optimally?) I was however happy my sim card was working and when I got home I put in my sim card and I could make and receive calls. The next morning I woke up to the same error No Sim | Emergency calls only, I was upset and called the call center just to be told the sim card is damaged again I explained to the agent this is a brand new sim and it's impossible it can be damaged again and requested to speak to his manager. I was told his manager is on another call he will call me later (Still never received a call back) and decided on the 8th August to go back in to Cell C Southgate to get the issue sorted, I vented my frustrations with the staff who couldn't care any less but rather just said I need to do a new sim swap. I did the process again and my sim card worked up until the 25th August 2021. The morning of the 26th August 2021 my phone required a software update which I did and once the phone restarted I was sitting again with the error No Sim | Emergency calls only. I didn't bother calling the *********** call center this time and would wait until I get to the mall again. I finally managed to get to Cell C Southgate mall on Tuesday 7th September 2021 and the same staff members are informing me they only have the cheap (orange) Cell C sim cards at there store I need to look out for a (black) Cell C sim card which should doesn't break as easy. I didn't have the energy to explain to them my story again as they were aware and I asked what can be done to solve my issue the staff member suggested I port my number to another network!?

I did a sim swap again the 3rd in a period of under 2 months after having had a working sim card for the years prior to this. I've spent petrol and paid every time for these sim cards and I am not getting the root cause and I'm expecting it to happen again soon.

May I please have someone at Cell C contact me and get to the root cause and solve my issue, please.