Samsung Black Screen of Death and cheating by service center

I was operating my S21FE 256 GB at ease until last Thursday and suddenly the screen went off. I took it to the shop from I purchased and then he sent it to the service who told me that the motherboard would be replaced and it would take at least 5 days for it to come to Ahmedabad. So I returned my phone as I had to travel on 21st June. Then I took the phone to another service centre in Gandhinagar which told me that all your phone parts are dead plus it has a liquid damage. When I said that haven’t dropped my phone in water then he told me that it is due to sweat poring in your charging port. My simple question is whats the use of IP68 rating if the phone is so sensitive to water. Plus none of the two service provides gave me a Jobsheet Number. I strongly urge you to either give me a new phone of the same variant or pay me my 32,000 rupees otherwise I’ll resort to a legal action.