The event organiser, vb30 - Das Halloween Haus in Boostedt bei Neumünster, has the legal responsibility to tell ticket buyers and event attendees how their personal information will be collected and used. You can find their Privacy Policy below or contact them to request it.
Die vollständige Datenschutzerklärung des vb30 Halloween Hauses ist hier zu finden:
https://vb30.de/datenschutz/