Sleep Country - worst imaginable service!

I bought a Sealy Merlot silk queen mattress and box spring set from Sleep Country Victoria in 2006. It came with a 10 year warranty. Despite the fact that I am only 125 pounds, the mattress began to get impressions in the euro-top layer shortly after. This wasn't a total shock, but after a couple of years started noticing I had pain in the lower back. As a young, fit person who is not overweight, this surprised me. The only explanation I could offer was this less and less supportive mattress - when I would stay elsewhere for periods of time, the pain slowly subsides! 5 years later, and I am completely dissatisfied with the mattress. There are significant indentations that actually cause me to roll in the night. I have tried rotating the mattress, but the same problem persists. I had the warranty evaluator on site, and he measured the sagging as a fraction of an inch shy of qualifying for a replacement under warranty. I guess I will have to wait until it sags the rest of the inch, and am confident this will happen well before the 10 year warranty is up! This blows!