If our network was getting congested, you would still be getting full realtime speeds, only torrents and file sharing would be affected. Speedtests should get full speeds. Is it possible that there is congestion on your exchange?
It could be the exchange, I guess, but this doesn't really look like it:
1. 192.168.8.1; home.gateway; 7.220, 7.850, 6.487
2. 105.236.10.129; 105-236-10-129-esr-lo.mtnbusiness.co.za; 15.584, 17.292, 20.026
3. 41.181.54.86; ipc-recieve-tb-2a.mtnbusiness.net; 25.117, 26.183, 29.119
4. 41.181.184.28; tb-dca-2.za--qux-a.za.mtnbusiness.net; 55.238, 57.208, 59.576
5. 196.44.18.8; unc-cpt-1.mtnns.net; 41.192, 42.120, 44.494
6. 196.44.31.66; ct-nt-1--rb-nt-1-a.mtnns.net; 99.636, 98.023, 98.454
7. 196.44.31.97; 78.623
7. 196.44.0.221; jh-dca-2.za--jh-cr-1.za-a.mtnns.net; 70.209
7. 196.44.31.97; 70.806
8. 196.30.1.53; 96.765
8. 196.31.220.12; ge10-1-9sub0.te3.jnb6.za.mtnbusiness.net; 67.570
8. 196.30.1.39; 71.549
9. 196.31.220.23; tengigabitethernet1-1.gw20.jnb6.za.mtnbusiness.net; 69.164
9. 196.31.220.25; tengigabitethernet9-1.gw20.jnb6.za.mtnbusiness.net; 95.610, 94.967
10. 196.31.63.198; tengigabitethernet5-1.hr15.jnb6.za.mtnbusiness.net; 60.146, 48.836, 51.336
11. 197.242.144.102; cms-gm.afrihost.com; 55.528, !X 52.811, !X 50.014, !X