At 10:09 pm I had two missed calls from number 0800 800021. I also had a voice-mail message that consisted of music.
The number is a Vodafone customer service number.

Why would Vodafone ring me when I am not a customer (on 2degrees account).
Why would they ring after 10 at night.
Why would they make me spend money clearing my voice-mail (and play me a song I did not like). 

If its some sales team ringing to try and win me back as a customer they are seriously going the wrong way about it. Andrew