Terrible service on uncapped LTE

I took the uncapped LTE contract with Telkom about 3 months ago and was promised really high speed as the deal is only limited to 150 customers per tower and no throttling except if I am using torrents (and the cap for torrents is 50GB per month). I was also supposed to get the aerial installed so that my connection is always optimum. Since receiving the contract no aerial has been installed, my LTE router only has 1 or 2 signal bars, my connection speed is extremely slow (about 12kb/s). I am really not happy. I called the call centre and they took me from pillar to post, bouncing me from one dept to the next. They told me that they have logged the request and would get the issue resolved. This was not done and I called again on 6 December and was told that the issue would be resolved in 48 hours or someone will get back to me and none of this has happened. I urgently need someone to contact me to resolve this issue as this is not what I signed up for.