Cannot book my TV for repairs

I bought a 55 inch Sinotech TV at Game Bloed Mall and collected it at Game Wonderpark.Game Wonderpark requested a proof of purchase from Game Bloed Mall,which I did but the attendant never gave me proof of purchase back.Now I reported the faulty TV to Game Bloed Mall and they cannot assist due to unavailability of proof of purchase.They said that they have implemented a new system and eradicated the old database.I called the manufacturer which confirmed a 5 year warranty on the TV but they also need proof of purchase.Since I swiped my card to buy the TV,I retrieved the date and the amount that I bought the TV at Game but still they could not help retrieve my information.