Internet access abroad via Vodafone

So, off to France in a couple of weeks, so I'd like to find out whether I can use my Vodafone USB broadband modem over there, and what the charges will be.

Can I find out from the Vodafone website?  No I flipping can't! It is perhaps the most disorganised customer-focussed website I've ever had the misfortune to get lost in.

Can I email them via the contact form?  No I flipping can't!  I need a Vodafone mobile phone number to do that!

Update!  Turns out there's a forum at the Vodafone page, where I found a link to this page.  Not cheap, but OK for a spot of browsing, I suppose.