I tried the same approach when a Fridge Freezer I bought went wrong after about 18 months. It was out of Curry's 12 month guarantee period so the store manager said there was nothing he could do.
When I told him it was reasonable to expect the product to last more than 18 months, he denied that that was the case! Fortunately for me, the manufacturers, Bosch, offer a 2 year guarantee themselves, but I was not at all impressed with Currys' attitude.
Sorry if I'm hijacking your question Tamirra, but I'd be interested to know, how do you argue that 12 months, 18 months or whatever is an unreasonable timeframe for a new product to break?