What should I do when a lawyer will not perform the work he said he would do after 6 months?

My brother and I visited a lawyer in July 2019 after our mother passed away in May to get advice and legal documents in settling my mother’s estate. She had a house which was in a revocable trust and a car and my brother and I are the only ones who are to inherit anything and are identified as such in her will and her trust. We have no other siblings and she was a widow as our father passed away in 2010 and she did not remarry. The lawyer has our mothers trust and the house deed which we left with him. It is now February 2020 and I have tried to call or go by the lawyer’s office at least once a month. The assistants in the office acknowledge that we have been waiting a long time but they have no idea when he will get to our items. I leave a message for him to call me and he never does. I guess I must find someone else, but I still will need those documents back. What we need is the property to be given to my brother and his long term partner with me signing over my interest.