Třeba to stačilo dočíst do konce:

If you need further assistance, or no longer have access to the email address on your Ubisoft Account please contact our Customer Support Team.
When submitting the Case, please include the following information:

Please change the Email address listed on my Ubisoft Account:
First Name:
Last Name:
Username:
Current Email Address:
Date of Birth:
Country:
Xbox Gamertag/PSN ID/Nintendo ID (If applicable):
Games registered to the account (including CD Keys if possible):
Correct (new) Email:

Once we receive the information, we will do our best to assist you.