Why dont you.... sign up for freeserve anytime !
Its £13.00 per month and you have unlimited surfing time. I think theres a deal on now where your first month is charged at £6.00
But saying that when i joined up 1st month was free, but that deal might of finished.
I got sick of worrying about how long i was online on payas you go. My mum was terrified of the phone bill !