Unknown IMEI number

On 11th Nov I purchased a phone from MTN Ballito Junction. It was a Samsung A12.

I did not take MTN insurance as I always use Samsung Care package. I've been trying to register my phone on Samsung Care website everyday since purchase date. IMEI number doesn't exist in my country. I've called MTN store and visited them personally, they said it's not their fault, it's a Samsung problem.

I've called Samsung on 3 occasions since the 11th Nov and received several references for my problem and promise 48 hrs response times.

To this day, there's no progress on this matter. I'M UPSET.