BAD SERVICE from GAME and HISENSE

I bought a 50" Hisense smart TV from Game and it's now faulty showing lines on the screen yet it was not touched nor fell. I've been trying to get them to assist with fixing it since it's still within the warranty and guaranty from the 1st week of January 2025 till today. They keep on telling me about the slip that I have not showing properly yet it should show up on the system since it was a card transaction.they once told me they are going to send my details to Hisense.which they have not.I have called them multiple times only for them to out me on hold or hang up. Very BAD service from Game store and Hisense. hope to never do business with GAME STORES and HISENSE again. Your just purchasing a bag of stress by dealing with them