If you purchased a Gold membership after September 2016, we advise you to contact the app stores' support team for further assistance as all refunds are handled by them.
For iOS devices:
If your WorldMate Gold subscription has been purchased via Apple iTunes App Store, please contact Apple’s customer support: http://www.apple.com/support/itunes/store/
For Android devices:
If your WorldMate Gold subscription has been purchased via Google Play Store, please contact them via the following link: https://support.google.com/googleplay/contact/play_request_refund_apps?visit_id=1-636107504372156262-298262600&ctx=about_refunds_on_google_play&rd=1