GAME and HISENSE Smart TV - Endless problems

On the 10th June 2019 my Hisense Smart TV was replaced by Game (Galleria Branch). My old tv suddenly had a solid white line down the whole left side of the screen. They replaced my tv with another Hisense smart tv. I have had endless problems with the new tv - it keeps switching off, or freezes during programmes and every single day I have to re-enter my wifi password into the settings screen. It was such a battle having my first tv replaced - I honestly don't have the energy to try and have this one replaced or fixed as well.