As with any tech issue the more specific you can be the better. Is it on the website, if so what browser and version. Is it on the mobile app, if so is it iOS or Android and which version. Also give your country and time zone to aid with reproduction.

If mobile, ensure you're using the latest version as apps get updated regularly with bug fixes. There is also an email address for the Android app ([email protected]) but it might not be actively monitored. Alternatively post the relevant details with the video link to their Twitter account to try to get it escalated.

If you get a response from any of those channels then you could then get back to customer support to request compensation. However, based on the post by pablos it does show the correct date on the summary before you complete the booking so that might work against you.