no official from Philips answered on this forum, so I wrote an email to support again. They finally answered there.
They asked me to fill out the return form. On the return form it says that Philips will contact you after you completed the form, but in my case they did not. So I recommend when you filled out the form, send them an email again.
After a long time, I finally got a return label and returned the projector. I asked them how long it will take and again, they don‘t answer the email. I have returned the projector on January 26th and haven‘t heard a word from them since.
All in all, my experience with the support is really terrible. Won‘t buy any Philips product again.