Game store refusing to repair or refund my TV that is still within its warranty

I bought an LG TV by Game stores last year May 2021 by december 2021 it stopped working while we were watching it.Send back to game for repairs as it's still within the 3 year warranty .Unfortunately I misplaced my slip but luckily I used my bank card to swipe ,therefore I had my bank statement as proof of purchase.They did not take my TV instantly as they said they will have to find their own proof of purchase on their system .Finally after few backs of putting pressure on them.They called me saying I can bring my TV back fr repairs as they have printed their own proof of purchase .In January send in my TV,a week later or two they called me saying that repairs can't fix my TV because they want the original slip of the TV.im so angry and disappointed at Game because when I bought a TV by them ,non of that information was shared with me.How can they refuse a repair but my TV still has warranty and that my bank statement clearly shows my TV was brought there....