Technicians have discovered the issue and rectified the problem.
Update 26/04/2020 @ 10:30: Cool Ideas can confirm that the below issue has been resolved.
Please note: If you are experiencing higher than normal latency to local sites (around 20ms); please be sure reboot your router.
If you are still experiencing issues with your connection, please be sure to log this with our Cool Support Desk on 010-593-2665 or log a ticket here --- We have picked up an issue with customer connecting over MTN fibre:
Date: 26/04/2020 at 09:00 Area/s: MTN Johannesburg Impact: Customers in Johannesburg on MTN will experience no connectivity.
Both Cool Ideas and MTN techs are currently investigating. There is currently no ETR.