I can’t comment on replacement of the bed, but I bought the Westin Heavenly Bed back in Spring 2006. It replaced a Simmons Beautyrest Royalty that I had purchased in 1987
Paid $900 for that mattress. I remember at the time it was around $1200, but I did some wheeling and dealing. .
The Beautyrest was still marginally O.K. when I replaced it and it was a great bed. I had slept on the Westin bed many times on business trips and it turned out to be a fantastic bed also.
Ended up paying $1100 for the Westin, which considering what I paid some 20 years earlier for the Beautyrest Royalty, I did not think was half bad.
For both mattresses, that included box spring and delivery (and for the first mattress, a low-end steel frame, which I still use).
So, our Westin is 10 years old and no noticeable problems. Wife and I still both love it.
Of course, things change and possibly the build process has also.
But, if it were me, and know that I really am NOT a mattress expert, I would ask for a replacement.
Hope if you do get a new one, it works as well for you as it did for us.
I’m sorry to hear about your bad experience with your new mattress.
If possible, I’d suggest that you return the mattress for a refund. In general, the brand you’re describing doesn’t use very high quality materials and your body impressions certainly aren’t going to get any better over time.
If you are able to get a refund, consider reading the Mattress Shopping Tutorial from this web site to assist you in starting the process over in how to buy a mattress. It’s a really helpful guide.