Adding new services to our account without our con

My husband phoned telkom to activate an dsl line for us. They said activation is free because there is already a existing line. The technician came out asked me what he must do. I told him that the line just needs activating. He tested the line and then said he needs other stuff and left for almost an hour then came back. He did testing on the the telephone pole and said he needs to go into the roof. The technician was to big to fit into the manhole and asked me for assistance with tools and stuff. After about 15min he said he is finished and left. The end of the month we received a bill from telkom with a service fee?? For what the work i did myself after you said its free. And added a dsl line speed service we didn't ask for we have our Internet with access not telkom. My husband phoned them told them me didn't take anything but the line rental, then said we need to cancel it by filling in forms. WE DID NOT REQUEST THE SERVICE SO JUST CANCEL IT, ITS YOUR FAULT NOT OURS DO WE HAVE TO DO ALL YOUR WORK????