I also got stung by this company for £15 only a few days ago. Same story, pop up from unrelated site which would not go away. I was not aware that anybody could charge your phone account for a "purchase" . My phone operator will not block this so I decided that I'd also cancel the phone contract. Effectively my phone was like a credit card, one click £15. Phone operators should not allow "payforit" to charge accounts. I wonder how much money sb7 have made in this way?
