I am trying to fill my FIDO prepaid SIM since 3 days but I keep on getting 'Oops, Something wrong happened!'.
I tried using Interac and Visa Card using Chrome/Firefox/IE browsers but with no luck!
Welcome to the Community! Can you try clearing your browser's cache? You can also refill by phone by dialing *611 from your Prepaid phone and selecting the top-up amount you'd like.
Hope that helps!