Slow, poor,incompet attempts at problem resolution

Suddenly, about 3 weeks ago, my internet started dropping me every few minutes. After countless calls, hard words and tantrums, a technician from my ISP stated that he can see on Telkoms network that my drops about 15 times a day, some days even more. 15 times a day! I have explained to Telkom that I need internet to do my work, but it takes up to 72 hours to get a technician to come and test my line. Then the technician tests the line, tell me there is nothing wrong and I must call when it happens again. Finally someone called me today and told me about how he is monetoring the line and what the options are going forward and that he would call me at a certain time. That time has come and gone, I cant use my internet and had to resort to other means at extra cost, just to get by while Telkom investigates further. I am so tired of paying for things and not getting it, that I am about to crack. I start an online course next week and dont know if i will have internet to do so. I am utterly dissappointed and disguisted at Telkom. I get a different explanation from every person I talk to, but I still dont have internet. What is a fair waiting time on something you paid for?