Had exactly the same problem last night. Better in the mornings and during the day, but I will bet good money that tonight will be the same story. Haven't ever seen it as terrible as last night though. Speedtest works, literally nothing else - could not load Telkom.co.za
Alternative test accounts both 100%.
This does NOT seem consistent throughout regions, suburbs or user accounts.
I had two near perfect months in May and June while other users in Randburg area and elsewhere experienced the opposite. Now the tides have turned.
Some appear to be blessed with immaculate accounts, such as MickeyD, who will virtually always respond with a 'Nope, all fine here...' - hold on to that line/account my friend, because you have pleased the gods of Telkom and they are bestowing their blessing upon you
Question: why has Ranger has never commented on this phenomenon? I do not think it is shaping since while many users seem to experience this, others in the same region on similar accounts have no issues.
Test accounts working fine should rule out exchange congestion... So what gives?