Hi Barb,
I’m also sorry to hear about your experiences but as dn mentioned there is no shortcut or alternative to some good research and testing when you are buying a new mattress and only you can decide on a mattress that is a good match for you.
It would be much less time consuming and much less costly to spend some time reading about what to look for and what to avoid than to repeat the same scenario all over again.
I would also make sure that any memory foam mattress you purchase meets the minimum criteria for a memory foam mattress outlined in post #10 here.
You can also read more about BedInabox in post #2 here.
Phoenix