Undenge appeared before senior regional magistrate Trynos Utahwashe at the Harare magistrate's court on Friday.
Muchadehama said they have since approached the High Court seeking leave to appeal to the Supreme Court against the latest decision.
He said they have also applied for bail pending appeal at the Supreme Court.
"However, the High Court has dismissed his appeal against both conviction and sentence meaning that he now has to serve a full sentence he was given by magistrate Hosea Mujaya," his lawyer told NewZimbabwe.com.
His (earlier) appeal against both conviction and sentence at the High Court was successful and he has been out all the while."