I'm a Otago Uni student but at the Christchurch campus. After the earthquake, we received a few texts from presumably Otago University (the number is just 4666) informing us of class cancellation etc. This afternoon we received another bunch of texts about the status of the UOC building. After this, a few of us on prepay noticed that their balance had gone down by quite a bit and we were wondering if we were being charged for these notification txts. I'm on a plan and checking my billing it looks like I'm being charged $2.60 per text for this.

So my question is are we supposed to be charged for these txts? I only provided my number as contact details to the Uni, had no idea I'd be signing up for some expensive txt alert program. The other thing is, how can I opt out of this?