SIM Not Supported.

When i bought this phone from a retail in Kenya it just worked fine. i travelled out of Kenya and tried to install an esim, it refused and last night when i restored the phone to see if the problem might go away, this popup apears. Am stuck with a bad eSim stuck in my new iPhone 15 pro max. How do I force the phone to get rid of this bad eSim?

I can't access settings to delete the bad eSim. I don't know which carrier this phone is locked to and i paid for the phone in full.

This is a HUGE BUG for Apple and eSims - since you cannot physically remove the eSim and the eSim is not erased with a factory restore, there is no way to get rid of the eSim without being able to access settings. Apple needs to provide a feature or process to be able to do this.

I can't set up my phone far enough to be able to access settings. I can only choose my language > choose my region > and then the "SIM not supported" error will pop up when its trying to activate. Any advice?