My NAS tells me when it experiences an internet outage. As a Vodafone NBN customer I experience unplanned outages on average twice every month. During April it happened four times already. They usually happen in the 1am-5am window and could last from 10min to 2 hours, interrupting my cloud backup process. I occasionally experience unplanned outages during daytime and evening peaks too (10-30min). I do get notifications about planned outages but they never happen when they say they will.
I have a feeling Vodafone is doing service affecting work willy-nilly. On top of very slow speeds to the USA I think it's been a mistake choosing them. They do not come across as an engineering outfit, just a backyard operation (Vodafone NBN that is, mobile could be different).
Do others experience the same thing from their ISP?
Vodafone have leaked personal and financial customer data in past. That's how much they care about the quality of their service. Search vodafail for what's in store for you!