Inti Creates is handling all general support for Bloodstained: Curse of the Moon, the 8-bit styled backer reward game for Bloodstained: Ritual of the Night. You can reach them at http://inticreates.com/contact/.
If you have a question about your backer code, please contact Fangamer at orders@fangamer.com, as they are in charge of backer code fulfillment.
Any other issues not related to backer codes should be addressed to Inti Creates at the link above.