Hi Lisa,
Welcome to the Heartland Owners Forum and to the family. We have a great bunch of folks here with lots of information and all willing to share their knowledge when needed.
If your's came with a memory foam it is probably better than what they were putting in the units, but some folks don't like the foam. I would suggest you call your dealer and try to work something out. If nothing happens there call Heartland Customer Service, 574-262-8030 or 877-262-8032, have your VIN and see if they will do anything. Most likely not, but you never know.
Enjoy the forum. Also join us at a rally when you can and also join the Heartland Owners Club.
Jim M