``Please Please Please get me off your mailing list, ive just recieved another 15 e-mails from you of over 1275K, its clogging my e-mail up and affecting my buisness, i never signed up to your mailing list, some idiot did that for me, details of which i can supply if you so wish, just please get me off the list.''
In cases like this we try to be as cooperative as possible and provide the necessary information (i.e. time and web-site of the phony registration). That should help to track down and identify the offender.