MWeb can't provide a service over infrastructure that does already exist

I started to research my options for upgrading my home ADSL internet connection to Fibre. Being an existing MWEB customer I looked at their site first. I go to their website, https://www.mweb.co.za/internet-connection/fibre/fibre-to-the-home, and it tells me that fibre is not yet available in my suburb. When I log into my MWEB account page on https://www.mweb.co.za/customer/my-products it also shows a message that fibre is not yet available at my address. Their call centre tells me the same nonsense...

MWEB should check your facts! I have confirmation from VUMATEL that aerial fibre IS available at my address. There’s even a VUMATEL distribution box on the pole right outside my home.

I have quotes from Afrihost, Vox Telecom and Cool Ideas all confirming that fibre is available at my address and that they are able to deploy immediately. So why does MWEB say that it's not available? Why can't MWEB match the competition and give me a quote?

I've been a MWEB ADSL customer since they took over the Tiscali operation in 2005. Do I now have to move to another provider because MWEB can't get their fibre solution together?