Problematic phones with SAMSUNG

5 January 2022. I took out a new contract on the 5th of Jan 2022. Samsung Galaxy A32 at MTN Lambton, Germiston. A sales representative assisted me with the contract application. I took this contract because it was affordable for me. This person stated that the phone gives problems, but yet still sold it to me. He also stated that he only gets complaints from this phone through other customers. To my knowledge why would a reputable service provider have problematic phones in their store and still expect customers to buy it? As a consumer, I would like this phone to be checked out, because 2 weeks after receiving the phone it started to glitch, freeze and the battery drains quickly. As a paying customer of MTN contracts my phone needs to be checked out or I need a new phone equivalent to the amount I'm paying for the contract monthly. The sales representative said that I must not come back with complaints, but why sell us consumers phones when it's faulty. Your response is highly appreciated.