If anyone wants a super easy and cheap means of restoring their internet to 'usable' level, get a custom Windscribe VPN account.
1) Head to their website, it loads fine locally
2) Create a custom account with SA as the only location ($1 pm) and tick the option for unlimited data ($1 pm)
3) That's it. You have a premium VPN for $2 pm, billed monthly
WIndscribe has good quality apps on all platforms. Just download, login and Bob's your uncle. I'm seeing very mediocre speeds, but everything at least works fine for general use.
If you want to spend more, ExpressVPN is supposed to be the best of the bunch.