Who do I contact for help with a problem logging in to a game I purchased from AppStore and log-in through GameCenter?
I recently purchased Runescape Old School through the App Store and prepaid for three months. All was well until today when I could not log in to the game. My account is not directly with the game vendor so I suppose I need help from Game Center but don't know how/whom to contact.
iPad Air 2 Wi-Fi, iOS 12.1