HI Astrid, You should have received an email from hello@joinballoon.com with your ticket information.
Please also check your spam/promotions folders.
If you cannot find the email, then you can reset your password here:
https://www.joinballoon.com/auth/forgot-password
Once you have reset your password, and logged into your Balloon account, then you should see The Ceramics Congress here:
https://www.joinballoon.com/users/info#my-events
Please let me know if that helps,