Vodafone ferry unfair

Just looked at my latest bill from Vodafone. I googled 4 pages on the cross channel ferry – the downloads were not altogether successful, and they are charging me £24.00 for the privilege! £6.00 per mb downloaded can you believe!? And they didn’t send me any warning that I was going to incur charges until I’d already used it! Grrrrrrrr! 02 next I think.