Yeah so Marshalls didn't like my excuse so I found those wire cutters (metal plier looking ones) and cut the pin because I had just enough room to do it without damaging the shirt. Came off clean (with a little bit of force) and now Im wearing the shirt .

Oh, and the dye pack was in the long slender plastic part but apparently cutting the pin doesn't activate it. I opened up the plastic part after I took it off (took it to the bathtub) and it popped a spring and leaked ink everywhere.

edit: and like 90% of the ink is all dried and crusty on the sides.