After refilling and sealing leakages for months, my AC guy told me that the issue is the evaporator cos he has sealed all "sealables".

Issues :
After refilling, it would work for weeks under normal weather but when you switch it on after a hot sunny day, it just die

I perceive some strange smell after each usage of the AC

Smoke from vehicles in front of me easily enters the car when using the AC

Options
They say that the AC guy would be the cheaper option but his cost is 20k
I don't know how much the Hyundai repair center would charge but rumors has it that they park your car for weeks and charge very high, removing and replacing items you would ordinary would manage without your permission yet bill you for it.

Any advice? I'm in Uyo

Have your ac restored back to factory spec and have a rest of mind