Hi izzi81,
It’s unfortunate that you didn’t find us before you made your purchase because some of the information here would likely have kept you away from any of the major brand mattresses or most of the stores that sell them. While I don’t think the issues you are currently facing are from the low quality materials because your mattress is so new … the materials are low enough quality that you would likely have had issues down the road anyway because lower quality foams in the comfort layers of your mattress will soften and break down much more quickly than higher quality materials and the loss of comfort and support that this leads to isn’t covered by a warranty.
At least you are having issues with your mattress early so that a comfort exchange can help you choose a mattress that is more suitable initially and also uses higher quality materials or design so you have less risk of developing similar issues in a relatively short period of time when any exchange period is over. The not so good news is that there may be few if any “good quality/value” mattresses sold at store where you made your purchase and in most if not all cases you won’t be able to find out the quality of the materials inside them and may be making a blind purchase. Without a refund policy and the ability to start over again you are locked in to a choice between mattresses that if you were starting from scratch I would probably suggest avoiding completely.
If you can let me know where you purchased it I can take a look and see if they carry any mattresses that are in a better quality /value range.
From the little research I did (Leons which I would also avoid) to find some details about your mattress … the Silver Moss is a relatively lower budget mattress ($599 quenn mattress only) so your budget range will not allow for the best quality and most durable materials but the best available in your budget is the goal. Your mattress has over 5" of low quality foam in the upper layers which are a recipe for early foam softening and breakdown because a mattress will usually soften and break down from the top down. The quality of the comfort layer materials is almost always the key to durability and longevity.
I would start of with some reading so you can gather some of the basic knowledge and information that will be helpful. Post #1 here is the best place to start.
The next step would be post #2 here which includes links to other threads with some suggestions to members here who were in a similar difficult position where they were locked in to choosing between lower quality/value mattresses.
Outside of durability and quality though you have a more immediate issue which is the suitability of a mattress. The durability of a mattress determines how long the mattress will remain suitable for you to sleep on but in your case it appears that your mattress may not be the best choice in the first place regardless of how long it may take to soften and break down (beyond the initial break in period where covers will stretch and foam materials will soften a little more rapidly). You can read a little more about durability in post #4 here.
So the immediate problem is to find a mattress that is both suitable for your immediate needs and preferences and durable enough to stay that way for a reasonable length of time. While your specific health conditions make things much more difficult because no mattress can correct a medical condition and no “formula” that can specifically predict which type of mattress you may do best with … testing carefully and objectively for what I call PPP (Posture and alignment, Pressure relief, and Personal preferences) following the testing guidelines in the first post I linked will give you the best odds of making the most suitable choice. The goal is always to first make sure you have good spinal and joint alignment and then just enough good quality comfort materials on top to relieve pressure points.
You have some reading to do but you will be much better prepared to make the best out of a difficult situation where your options are much more restricted.
Phoenix