Take a look at this, I pre-purchased XXXXXX from GMG and wanted a refund on it since it won't register on Steam anymore, so I submit a support ticket, here's what I get in response:
"Hi there,
Thanks for getting in touch with us, unfortunately we would be unable to offer a refund on XXXXXX, however we have placed a $15 store credit on your account with our compliments.
Regards,
Rich Metcalfe
Lead Technical Specialist Green Man Gaming"
Amazing customer service... This deserves to be in a golden plaque on the OP. Even better than a refund imo.