Dear @Toni, 
Thank you for reaching out to us again! 
Have you tried contacting a pro bono legal advice service? 
On this website you can find organizations who offer such help in your area (just click on the city/region): ****://***.refugeelegalaidinformation.org/germany-pro-bono-directory 
Maybe another member has had experiences with a lawyer already and can share their contact details :) 
Best regards, 
Isa