Then approach Vumatel - but it's simply poles on municipal land which is beyond your control. I know people that complained about subterranean deployment which caused broken driveways etc. They won't go into your complex should there be consent (Will just presume body corp), and if they do it is normally done via any underground conduits that you have already.
Normally how the providers work, is a suburb rallies behind one and gets enough interest to make the Fibre investment worth it. This means that in your suburb there was enough interest to get this going. So while your complex doesn't want it, there are obviously enough people who do.
There are plenty of posts on here about aerial vs subterranean deployment, but it seems that your suburb chose the one over the other for whatever reason. Mine chose Fibrehoods for whatever reason (and we are surrounded by Vumatel). It's just one of those things that we live with to get what we want - you didn't go and get Telkom to dig out their poles I presume?