- Log into your wallet.google.com account
- Remove your old payment method(s)
- Add the payment method you wish to use
- Tap Settings > iTunes & App Store
- Tap your Apple ID, then tap View Apple ID. Please sign in if necessary.
- Tap Payment Information. (If you're using Family Sharing, only your family organizer can update the payment information.)
- Change or remove your information
- Tap Done
You would be able to change your billing information here: https://cp.bluesnap.com/jsp/account_login.jsp
If you do not have a password you can set one by selecting "forgot password" which would allow you to set one. You would be able to find the "order id" on the invoice in the Magisto "account settings" page.