Terrible Service with ADSL

The service that I have received has been terrible from the start. I had to phone numerous times to even get the sale done. I was told that I could get 10mbps in my area and I have never gotten more than 2mbps. Most of the time the line does not work at all and when it does it is 0.4mbps. The person who was supposed to install the line did not arrive on the day that the installation was scheduled for and I wasted a day off of work for that. The next day he phoned me and said he was outside my house so my wife left her work and went to let him in. The line has not been working properly since. I have spent over 6 hours on the phone with Telkom trying to get it fixed to no avail. Nobody was able to fix it over the phone and Telkom never sent out a technician again. Telkom has not performed in terms of the agreement and I no longer wish to pursue with ADSL. I want to cancel the agreement immediately because the installation was not done properly, alternatively, Telkom is unable to provide me with what I ordered. I want to take out an LTE-A contract with Telkom ASAP because hopefully this will give me the speed that I require. <br> <br> I want to return the modem to Telkom ASAP.