Important question to Komparsenfirma?

Tomorrow at a netflix shoot as a comparse in munich. I'm logged in to the page Producers Friends. Of course, I have now confirmed by email. But now would have to cancel because an important person has died. But I'm afraid that I get something in the bill because I cancel at short notice. Can you help me please

Write the cancellation right now - also by e-mail.

And the corresponding information you would have to google instead of asking the question easily here… Read emergency / refusal carefully by https://www.p-f.tv/mitglieder/am-set-drehort/

Hi, sorry for my ignorance. I'm just about your sentence: "afraid that I get billed as something…" Stumbled. I'm not familiar with extras for movies, but frankly I find billing anti-social, not legally binding. If anyone can enlighten me, then please. My knowledge about it is a white sheet of paper.