Telkom seem incapable of fixing problems

I purchased a LTE Home Premium Package from Telkom nearly three months ago - a package they were touting under their \Summer of of WOW"promotions as providing superfast internet speeds. Took it home and set it up after cancelling my ADSL and got...super slow internet speed. So went back to Telkom shop at Clearwater (where you wait 40 minutes to speak to somebody who has no idea how to help you) several times with no joy. Took the router back to the shop where they tested it and it worked fine. No advice on what I can do... eventually told me they would organise a technician to come out to my house and have a look. No technician came. Took the issue to Telkom Cresta"