Let me elaborate a bit more here:
So a typical Vumatel maintenance event entails us getting notice, Vumatel making changes on their side be it backhaul upgrades, equipment changes or the like. Typically nothing facing us changes, unless they give us notice of there being changes. (In this case there were no planned changes)
So in this case Vumatel made changes, and once done customers come back online.
It affected a particular package relative to us (A vlan they removed by accident), which means most customers came back online, but not all.
This then doesn't trigger any major events for us and so is treated as regular line downs, that is all we can see from our side. (And so regular process follows, log with Vumatel, Vumatel checks line is up, closes ticket, dispute ticket and so forth)
Once we have been through said process we can escalate further for the Vumatel netops team to investigate, which is what happened this morning. To which they found in error they removed one of our vlans affecting you and a couple other customers.
I hope this explains it better, IE the change impacted us only and a specific bunch of customers.
I believe Vumatel re-instated the affected vlans this morning and will get a report from them for you.