Telkom worst ADSL and maintenance.

Being battling with internet connection on ADSL line for the last 6 months. Connection dropping and speed terribly slow. Can't even do a proper download without it failing about 6 times. Streaming movies and series is non-existent. Currently there is no internet service available on my telephone line. There is a lot of noise on the telephone. Had a technician come and investigate the problem but he is blaming my ISP. Got my ISP to do a test on my internet and it came up with a "AUTHENTICATION FAILURE". My internet connection on my modem keeps dropping out every hour now. There isn't even an internet connection currently available. This rotten service must be fixed. How do I escalate this problem further because I have been logging the fault online but nothing gets done to resolve the problem. It is just getting worse by the day. It is time that another landline provider comes into play and gives Telkom a run for their money. Fibre is not even an option as Telkom is 20 years behind with the installation of fibre and every day they fall a year further behind. Their is also a problem on the telephone line but nothing is done about the problem. No maintenance get done on the telephone lines. When I report the fault online the system shows job done for 2 of the faults and the other in progress. The job done is to say the technician had a look but did not repair the fault.