Always got slow internet

I have been reporting my line for slow internet speeds for some time now and there is just no difference or anything being done about it,the Internet will work fine for 3 or 4 days then the Internet gets so slow I can't even get onto the website,and I have been reporting the fault time and time again,then guess what they just send as ms to say your line has been restored then 48hrs later I have to report a fault again this is my last attempt to get Telkom to fix the line if the don't do something about this situation this time I am going to cancel my service cause I'm paying for something that's not working.