Public transport in Ghana

Public transport in Ghana is mostly taxis and tro tros. There are buses too but it is difficult to find any information about it. Yesterday, we decided to go to Koforidua using a STC bus. We got to the Bus station and there are no people manning the information counter. The lady at the ticket counter only said "Go to the circle" and she would say nothing more. Miss the US VTA systems, where the person on the other end of the phone line, will give you the best possible routes, and more than one option. So then we went from one bus stop to the other. Finally, we went to Nkwakwa instead of Koforidua. It was 4 hrs each way and it was really late when we got back home. When on work vacation, the best part is going any where is quite fun. But I need to find a way to extract information from non cooperating STC employees in Ghana.