Search and decide the new lawyer.
Give the new vakkalathnama to the new advocate. SMS/e-mail your decision & request to handover all the case related papers to the new advocate along with NOC. Your new advocate will handle the rest. If the advocate refuses, then the decision to change advocate will be informed to the court by the new advocate. We are not supposed to run behind it, we pay them, let them do their work.
I have changed my advocate once when I found out some double deal. One thing, let me say, if it is the money, frankly tell him. He will not let go of a well-paying party. Advocates charge as per paying capacity also.
If you feel that the case is dragging and he is not handling well; rethink. It is a syndrome, majority go through that. My advocate was good enough to tell me this. He told me to study my wife’s behaviour in court. She was shouting at her advocate. How come both the advocates are spoiling their case!!
Changing an advocate is not a big deal, getting a better one is.
Best wishes for getting a good lawyer.