Yes walmart should take it back even if you can't fit it back into the box as long you have your recite
Walmart accepts returns of most open and unboxed items as long as you still have the original packaging and accessories. Walmart may accept your return even if the packaging is damaged is what I got from google
The only thing is, I believe walmart has a limited turk policy on mattresses. I'll assume since you're rolling it up it is an air mattress. Last I knew they would only take them back of purchased within the part 14 days and even then only for an even exchange
I had the same issue one time and it wasn't a problem, as long as you bring in everything. The box, packaging and receipt. They will take it back.
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