Unless you've ordered an item from the iMore Store, iMore has not taken money our of your account. Furthermore, if your grandson has been playing on your "phone", it may be possible that he purchased an app or a game from the phone's app store. Whether you have an iPhone or not, you are still responsible for any purchases made. Either restrict purchases, closely monitor your grandson's activities on your "phone" or remove his phone privileges altogether to prevent further purchases, whether accidental or on purpose. Anyway, to apply for a refund, you need to contact the app store's customer service section.