TELKOM WORST ISP EVER

I am struggling with Telkom for weeks. I have upgraded to a 10 mb ADSL line. Two technicians came to do the instalation. An allready opened router box with another persons details with username and password is written inside the router box. Since the instalation i have had countless battles with Telkom as my line speed goes from 8.5mb to 37kbs, constantly going up and down. I have reported it on numerous occasions to Telkom when i can get hold of them etc. A Telkom consultant warned me that if they do not find a problem then i will be fined. FINED????? Why should i be fined if i am reporting a problem with Telkom equipment which they have installed specially an allready opened router box. Two weeks ago a Telkom technician arrived at my addres without making an apointment. Luckily my son was at home. The technician was up and down doing what he should to get to the bottom of the problem. I asked my son to tell him to phone me once he is finished. The technician phone me 10 minutes later and informed me that there is a fault with the underground Telkom cable and that he will report it. He also informed me that Telkom will repair the problem within a week. Sunday 27/01/2019 i contacted Telkom lodging once again another complaint (same issue no internet) plus i left a snotty message in Tekom's inbox on Facebook. Yesterday 28/01/2019 a technician phoned informing me that he is at my address. Luckily for him i was at home. So there i am standing with all the hope in the world thinking this guy will solve the problem as he is talking all these technical trouble shooting etc language. He plugged in his phone in my Telkom line and said that the line is clear and there is no noises, eish, and then he tells me that there is nothing wrong with the underground Telkom cable. And then he mentioned something that was interested. According the Technician there is a thing called Acia (might spelled wrong), but this is either a device, system or program that monitors your line for any faults or defaults. Once it detect a problem with your line it automatically lowers your line speed but this program, system or device can be removed by someone who he then phoned and WALLA my line should be fixed. That same evening (yesterday) i contacted Telkom once again with the same problem and i am still sitting with the sam problem, between 18:00 - 23:00 i do not have any line speed which results in me not having any internet or should i say hardly have internet