I've been having terrible throughput here far Pretoria-East.
I have several 8ta contracts, about 5 on the property where I am, all the modems used to get AT LEAST 10 mbps, and excellent latency.
The last week or two, sites takes up to a minute to respond to DNS requests, and most of the time the site loading won't complete.
Average signal is about 75% constant HSDPA.
Two modems are connected to bidirectional antennas, and they too are battling the last week or two.
I know the issue does not lie with my equipment, and I have LOS to the tower.
I'm struggling in Pretoria East as well (Garsfontein), since last Friday I reckon it's been worse. Have reported it and got a reference number. Hoping is gets sorted quickly, as I use 8Ta for my business connection since Telkom ADSL is totally useless in my area too.