If you subscribed through Apple/iTunes:
Apple handles all refunds and cancellations for Hinge subscriptions or Boost purchases on iOS devices. All refunds are granted entirely at the discretion of Apple. To request a refund from Apple, please contact iTunes Customer Support directly at https://getsupport.apple.com/.
For instructions on how to cancel your subscription through Apple, please see this support article: http://support.apple.com/kb/ht4098.
If you subscribed through Google Play:
The fastest way to get a refund for a subscription or Boost purchase on your Google Play account is to request it directly from Google. You can find instructions at Google's support page: https://support.google.com/googleplay/answer/7205930.
For instructions on how to cancel your subscription through Google, please see this support article: https://support.google.com/googleplay/answer/7018481.