1. If you successfully reset an admin password but still can’t sign in to your G Suite account because of 2-Step Verification, create a Google support case. You'll be asked to show you own the domain by adding a CNAME record to your domain’s DNS settings and providing answers about your G Suite account. 
  2. You need to know the following information to fill out the Admin login issues form:
    • Date the G Suite account was created
    • Original secondary email address associated with your organization’s G Suite account (the email used to sign up for G Suite)
    • Google order number associated with your account (if applicable)
    • Number of G Suite user accounts you created
    • Billing address linked to your Google Pay account
    • Type of credit card used for G Suite purchase and its last 4 digits