Horrible bed

You know how restonic says 10 years guarantee for their beds?? Thats a lie, nothing is more painful than going to bed and the bed you bought 4months ago and it makes horrible sounds, i went to the shop to report my bed again, and the sales assistant said due to the high volume of orders restonic get, they stop making quality beds, i wish i was told this before buying the bed. I really wish i knew better