Chat with Support and reference this article. 
Please include your email address and username for your Sphere account

The account number can also be found by viewing the page source after logging into Sphere.  To do so in Internet Explorer, complete the following:
  1. In the toolbar, select View>Source
  2. A text file should pop up
  3. Just use Ctrl+F and search for 'Account'. 
  4. There will be a file path called "AccountTempFiles/accountXXXX"
  5. The Xs represent your account number