Rotten mattress and rotten sleep!!

We bought the mattress recommended by the sales person and have had it for 2 nights now and we can't sleep on it. It hurts our back so bad we got off and slept on the floor. It feels like we are sleeping on a piece of metal. I had surgery on my leg yesterday and the floor felt better for me last night than the bed. I am ready to go get my old mattress out of the dumpster!!! Guarantee yes till you are out the door and they have your money. DON'T BUY FROM THIS STORE!!!