Bad Service Cell V Clinix Melville Johannesburg

I went to Clinix V Cell in Melville Johannesburg (C/O Main & 4th Street, Melville) to change my battery of my Samsung s21 and it cost me R750. I also ask him to check my cable charging unit which he tested and didn't work, he only changed the battery. A day after that I told him the battery runs down very fast and it gets very hot on my wireless charger, it's worst that my old original Samsung s21 battery. It's 2 weeks later, I must keep my phone on my wireless charger most of the time. The guy refuses to change the battery, he says it's my motherboard. this is bad service. I will never buy there again.