Samsung lacks intergrity

I bought a Samsung A3 core from Ackermans, 10 days later the phone's battery started to overheat and it would shut itself down. Took the phone back and it was taken to Samsung, now the technician tells us there is a possibility of water damage. "A possibility" what is a possibility? Don't your technicians check what's wrong with it or do they guess? Now they sent me a quote equivalent to the price of a new phone based on a possibility, which is absolute nonsense as that phone has never gotten anywhere close to water. Samsung technicians lack integrity, their phones are nonsense and now they are trying to pass it off as my fault based on a possibility. Shame on you Samsung.