Pretty much all department store cosmetics, CVS, ulta, and sephora take returns on used products. If they don't, email the vendor, because they're supposed to.
Side note... I despise things that are named "better than sex" - one, because it's sooooooooooo completely tacky and overdone, and two, because it's pretty much never true. There are no cakes or mascaras that are better than sex.
*Unless you're under 25, posting in the non-18+ part of fb, or my child. In that case, ALL mascaras and cakes are better than sex. [emoji15]