VanessaL
We are sorry that this mattress slipped through the slats on your base.
Could you tell us how far apart the slats are? If this mattress is placed on a slatted base, the spacing between the slats should not be wider than 3-inches for proper support.
Your satisfaction is important to us and we would be happy to help find a solution for you or assist with a return to Home Depot if you prefer. Please email us at: cs@linenspa.com to talk with us directly.
Thanks!
-The Linenspa Crew