FAULTY BED DESIGN

what a nightmare! I bought a bed from the Bedstore in Dec 2012. I spent what I thought was a lot of money on a kingsize Cloud Nine Shatu bed. Its sagging so badly now I have chronic back ache. Basically the base is collapsing. It only has four legs instead of 6 and the slats are too wide to give adequate support. Hence the mattress sagging. It is out of guarantee, which is 2 years and the warrantee it seems is not worth the paper its printed on. They have offered to let me " upgrade" and buy a new bed. Why would I buy a bed from a company that sells ****py beds. They also sell Rest Assured and Strand mattress. I wouldn't trust any of their products. Poor bed, poor service