Nightmares

I went to Johnathan Stevens believing they were a reputable company located in Grand Rapids, MI. I went into the store on 28th St at least 3xs before purchasing the mattress to lay on it and speak to the sales person. I explained my situation with other mattresses (not good), believing they were all 'Just Talk'. He convinced me that the mattress I purchased was a good mattress and should help me to sleep better at night. Well, the first week, yes. Now, maybe 6-7 months since purchasing, I am back to square one. First, the support is no longer there, I feel as though I am sinking and the stiffness/aching feeling in my body is excruciating. Secondly, last night I heard these squeaking noises. I had a bad dream that I woke up and all the bed springs and foam were all around the bed and the only thing I was sleeping on was the fabric of the mattress. A dream or premonition? This Sucks!!!!!!!