ok, hold my hands up, I went on an adult site drunk

I probably clicked that I'd read the ts & cs though didnt I guess or just ignored them thinking they didnt have any info about me other than email address. Which does contain my real name
I havent contacted them though am getting pops saying I owe 70 quid for 2 x different bits of software, it says they can get my address from my ISP. Are they allowed to release that info? I dont mind reinstalling the PC to get rid of the damn software but can they actually trace me I wonder?
Evil tactics!
thanks
