Hi SMBrand,
All the mattresses you are considering are among the mattresses that either use lower quality materials or that don’t disclose the quality of the materials they use that I would would encourage people to avoid completely (see the guidelines here)
If you can cancel your purchase without penalty I would do so and then start your mattress search all over again using a very different approach to buying a mattress.
The first place to start is the mattress shopping tutorial here which has all the basic information, steps, and guidelines that you will need to make the best possible choice … and know how and why to avoid the worst ones such as the mattresses (and the store) you have been considering.
Phoenix