Refunds can be made via a personalised mini-site, or at the bottom of this page!
All you need to do is enter your email address and the ticket and/or wristband number. The latter can be found on the back of the media in question.

Once connected, you can access your refund, for this, it is enough to register his card if it is not already done or simply press on "request a refund".
This will be done in the following days.