Saggiest Mattress Ever Owned

This king mattress sags on both sides where we sleep. There is a hump in the middle between us that we have to roll up hill to get over. It is like sleeping in an uncomfortable hammock. The foundation is two pieces and the edges are padded and wrapped in fabric. The wrapping on the two edges that touch raises the center of the mattress causing the hump in the middle. The outside edges of the foundation are also padded and wrapped causing a smaller hump on each edge. Everthing I have read about foam/spring mattresses says the foundation should be flat like a platform. Therapedic says that “some” sagging is normal and that we have the rught foundation. Perhaps upper management should spend the night sleeping on this mattress. We purchased the mattress from Kanes who just referred us to Temperpedic. By the way, we are in Florida for 3-4 months in the winter so have not even slept on the mattress for what is equivalent to one year. NEVER purchase a Temperpedic mattress.