Hire a replacement lawyer and discuss your questions with him/her. Since you posted to GA lawyer, TN lawyers may not see this post and they are the ones who know the procedures there.
You can use the find a lawyer function on this site to locate a Tennessee lawyer. All experienced lawyers have had occasions when they replaced another attorney who was unsatisfactory to the client, and your new lawyer can help you with the transition and also with the termination of the first attorney. Getting back your retainer will depend on the terms of your first lawyer's engagement and how much work he or she really did that can be assessed against the retainer amount.