Hi karalu,
I’m sorry to hear that your mattress purchase didn’t work out as well as you hoped.
As you probably know from the time you’ve spent here latex isn’t everyone’s preference and a mattress that works perfectly for one person or even large groups of people may not work well for someone else regardless of the quality of the materials or the “value” of the mattress. The good news is that that the mattress you purchased was returnable which can sometimes be an important factor in an online purchase.
There may still be some versions or designs of latex mattresses that are a good match in terms of PPP or you may find that other types of mattress are a better choice for you.
The best advice I can suggest is to follow the steps of the mattress shopping tutorial one at a time and do enough local testing that you have a good sense of the types of mattress and materials that you prefer and that tend to work best for you (latex or otherwise).
Phoenix