Why is a top mattress firm giving me a bumpy ride?

Simba has a ‘no-quibble’ guarantee but it hasn’t fixed a ridge running down the middleI bought a Simba mattress in March 2017, and at the beginning all was good and we were happy with it. However, within six months it developed a serious problem – a big ridge that runs from top to bottom in the middle. It is causing me bad back pain, and I have had to be treated by an osteopath. When I lie in bed with my two small children, I am higher than both of them, in the middle.I c