It's my own stupid mistake; I was buying the painkiller collection and didn't notice that GTA IV was in my basket still from the week before, so ended up buyig it for $20 accidentally. Steam support said all I had to do was rebuy the painkiller collection as a gift to my own mail address, and I would get a full refund of the basket(apparently they can't issue refunds to individual basket items).
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Joyrock
Fresh from my first justified ban. Ever!