Roll Together Alone

I bought a new mattress recently (Not a Silent Night one) but the sales pitch did remind me of this advert.... unfortunately, I am having a roll to the centre issue as it sinks in the middle! If it's that bad when I am on my own heaven help me if I share my bed with anyone!!!

Think a complaint will be going in - just as soon as I find the e-mail address for the company... now where did I put that paperwork?!?!