Hi cgibsong002,
I’m sorry to hear about your experience with your mattress but it’s good to hear that your warranty claim was successful.
Unfortunately the issues you are having are much too common in the industry because the major brands (including the Beautyrest Black line) use some lower quality materials in their mattresses that are often subject to premature foam softening and impressions much too quickly relative the the price you paid.
Like many of the members that have come here with a similar situation you are in a somewhat difficult position where you need to exchange a mattress and are “locked in” to a store or a manufacturer that sells mattresses that I would normally suggest avoiding in the first place and where there may not be any particularly good quality/value options available to you.
Having said that … there are some suggestions and ideas in post #2 here about the two main strategies that you can use that can help you make the best of a difficult situation.
A refund isn’t one of the options available for a warranty claim so it’s very unlikely that you will be able to receive a refund no matter how hard you try.
Phoenix