Telkom Technicians not sevicing clients within their hours

One month ago I ask Telkom to increase my wi-fi speed limit to 8 . To my dismay I never received the 8 speed limit. My line is sinking, receiving wi-fi intermittently .Made several calls. I received on the 16/09/2019 a reference number .A technician phoned to say that he only works until 2pm and no Saturdays. I went to Canal Walk in Cape town to complain and the lady put me thru to a Telkom Service Consultant.(22/09/2019) I was told that a Technician will phone me during the course of today. My charges must be reversed as I have paid for a 8 speed and I only receive 3.50 to 4 speed and that is if we were lucky. My land line was tested and the gentleman on the phone agreed the my phone made a crackling noise and my cables were damaged.