Thank you for clarifying the matter.
German bureaucracy is not the fastest. Sometimes you have to be patient waiting for a reply. It's probably best to rely on your lawyer in this case as he is probably experienced with situations like that. It is possible to file an action against authorities if they are taking to long to process your case, but that's only possible after 3 months or more.
If you want to search for a different lawyer you can use search engines and set the filters to your needs. For example this one:
I searched for lawyers in Mönchengladbach that are specialized in asylum and migration law. These are the two results that I found: