The worst nightmare of a bed. NOT even close to World Class

this is an absolutely horrible bed and the worst possible purchase. I see that this model is discontinued and I know exactly why. We tried this mattress out in the store and it was wonderfully soft yet firm for my husbands back problem. The salesman said that the new bed would be firmer than the floor model but it would soften over time. Our nightmare started the very first night. The bed was very firm with large divots that you could lose you hand or heel in. The whole bed is lumpy. Giving it time to soften I waited past the time I could return. What a mistake. After 1 year the bed started sagging in the areas where my husband and I slept and a large ridge formed in the middle between us. To say good night I have to climb out of the divot and climb over the hump. My husband is an average size man and when he lies in the bed he is a good 6 inches in a hole. We both wake up in horrible pain. His back problem is worse and I now have back pain when I never had before. When I try to fall asleep, I have such a hard time. My rib cage hurts and my hips and buttocks' are in a hole. I feel totally ripped off. The last mattress we had lasted 14 years and was in better shape then this one when we got rid of it, it was a Serta. I don't understand why a company would make such a horrible product and call it World Class. I just want my money back, but I have read online that Simmons has horrible customer service and will do anything NOT to honor the warranty. So here I am 3 years in to my nightmare and unable to sleep so I am writing this review. I will never buy a Simmons mattress ever again. And now we are going to have to pay to have this thrown in the dump. I am a Registered Nurse and my husband is a small business owner. We cannot understand why this company would rip off honest people.