Game incompetence in honouring extended warranty

We bought an LG TV from Game and espeically took out an extended warranty. We went to Game store at Gateway, Umhlanga, gave them all the paperwork etc and they have been telling us for 3 weeks now that someone from the extended warranty department would call me to discuss next steps. This was after a technician had assessed the TV in my home and said he needed to return with a spare motherboard and replace it as that was the problem. He never returned with the spare part to fix it. I am currently on holiday without a TV and this incompetence from Game is upsetting me. It feels like they keep "passing the buck" and it becomes the next persons problem and in the end nothing actually gets done. We have made the effort to spend the money in extending the warranty and would expect that Game cooperates and honours the extended warranty. Can I please ask that Game contacts me asap with a resolution to either send out the technician to replace the motherboard, or to at least then give me a repalcement TV in the meantime so that I can watch TV on my holiday.