Can you confirm that business uncapped is not shaped? If it isn't, why is the network status constantly green when there are obvious issues?
I don't think shaping is the problem - last time this happened, there was a problem with the CPT IPC which Telkom had to sort out, meaning reduced capacity for traffic going through here. Seems to be the case again - but it's worrying that there's no AH presence in this thread confirming the problem, or a change on the network status page.