It took a while but glitch support has gotten back to me & said they will be processing the exchange. They apologized for the late response & said my emails got accidentally flagged spam by their system. I'm still a little annoyed that this happened, but if i receive the items then all is forgiven
I'm disappointed with @glitchprod.com Customer Service. I Iove their merch, so my mom bought me 2 shirts and a hoodie from them for Christmas. But they were sadly a size too small. Customer service said If I ship them the clothes that they will do an exchange for a new size (Part1)