Welcome back to the Wefugees Community and thank you for reaching out to us.
If you are struggling to get in contact with your lawyer, asking a counselling office for support might help. Changing the lawyer should be (in my opinion) the last resort as it usually creates confusion and more financial costs as well. As I remember from one of your last questions, you stay in Hannover right? I made some research and you may contact, for instance, the Diakonie counselling office there or the Red Cross. Please follow the links for contact details.
I hope this helps and please don't hesitate to get back to us with any further questions.
All the best,