Mike wrote:
>
> [...] I asked Vodafone
> how much it would cost to use a contract 3G datacard in Belgium.
> Their reply (in writing!) was that it would cost a fixed 8 pounds 50 a
> day provided that I use their affiliate, Belgacom Mobile / Proximus.
>
> So I did. When the bill arrived, it was for 581 pounds for perhaps
> three hours use.

http://www.abroad.vodafone.co.uk/ind...=1&le=1&sn=s10

They appear to have not told you about the FUP of 50MB for your £8.50+VAT.

Did you shift around 116MB in that 3 hours?