If you purchased through Google Play, please refer to the following article which explains how to update your payment credit card, so you can place a new G Cloud order:

https://support.google.com/wallet/answer/6285500?hl=en

If you purchased through Avangate, please:

  1. Go to https://secure.avangate.com/myaccount/
  2. Create your own account or if you already have one, sign into it using your email and password.
  3. Update your credit card information.