Bad service from supplier technicians

I have been tryng to get Telkom technicains out since the 11.12.15 to fix my landline and keep being told that it is with the technician. This is now the 4th week with no telephone. I cannot do e-mailing or banking from home and cannot Skype my elderly parents overseas. Where do i go now as supervisors do not call you back and you can never get to speak to management.