Like camping every night

We bought a P6 split King Sleep Number bed in Nov of 17. It is now Jan of 18 and while my husband LOVES this thing I HATE it. At first it was good. After about two weeks I stopped sleeping through the night and found myself constantly adjusting the sleep number. Here's the issues: lower back pain every morning, when I adjust to help my lower back, my upper back is uncomfortable. When I sleep on my side I like a lower number, but then I feel like I am in a hammock. I unzipped the casing and found that I am basically sleeping on an egg crate on top of the air mattress. I have also found that my neck has been in pain too, which never happened on my traditional Stearns and Foster. I am going to initiate the return process next week. We have already purchased a Hybrid Beautyrest Tolliver to replace it. I am HOPING so much that I will like a hybrid. In summary it does feel like an air mattress with padding. It might be for some, but in no way is it for me, I think I am couch bound until the new one is shipped. Luckily our couch sleeps very well.