Internet speed not what was promised

I have made at least 20 calls to the call centre complaining about the speed of my internet package which is the Telkom Mobile LTE advanced package at R707.50 per month excluding intitial installation costs. This service is extremely unstable and keeps dropping and the speed is worse than my previous ADSL line with MWEB package. Telkom Technicians have moved the aerial but still the service is bad. My last call to the call centre was on 07/02/2016 to Nomali (refnr ***6) who promised that an experienced technician will come and if necessary put me back to my ADSL system or investigate if fibre could be possible. To date I have had no response. I am an IT consultant and work from home a lot and cannot work with this unstable service. Should I go to the Consumer Protection Council or what must I do? I hope this complaint will get a response since no success with call centre