People vote cold for very odd reasons, e.g no roaming so no good for me! (devil) They forget that other people require something different to them so fail to see an obvious good deal, I wish I didn't need roaming, I would jump on this. a real money saver on the only network that works well for me.
Why... I haven't voted cold
Still no one voting cold wants to tell why !
0800 and 0808 numbers are free, full pricing available here: https://www.vodafone.co.uk/lightbox/basics/3gb/#additional-charges Personally I think that this is a good deal. I never roam and Vodafone coverage is fantastic where I live compared to the other networks. Heat added.
If only someone had already made that point, in a more eloquent fashion. It may have saved you the trouble.