Doesnt help you in this case, but in our womens group we have a meeting about middle of january, when we bring in things like wrong size or present s in a colour you dont like or a make up people you never use.
We have done it two ways. Just bring things in and everyone looks through and takes anything they can use. No exchange of money or anything. Or we take things in and have a star system, where when they come in we give them a star rating, so a box of make up would not have the same amount of stars as a cashmere jumper. Then you "spend " your stars and can adjust with cash if necessary.
We also have another simple way . We ask people to give unwanted things, and then we have a little auction, so it doesnt matter if there are lots of things or a few. The items are sold and the money divided , half to our chosen charity and half to the funds that run the group. Anything left over , the owner is asked if they want it back and if not it is given to a charity shop. So our halos shine brightly as we leave!!
We have got rid of something that could have stayed in a cupboard, a charity has benefited , the funds increased and we have a bit more space at home. So, if you cant get satisfaction about your garment, at least you can do something with it and feel better about it and not keep seeing it in the drawer and feeling annoyed with the situation. Good luck anyway and hope you are able to exchange it for something you can enjoy.