www.tpsonline.org - will remove you for free. To stop yourself getting back on to the lists, you must stop giving out your number on raffle tickets, claiming prizes, bingo scratch-cards etc. etc. They're not usually "cold" calling you, because once upon a time, someone somewhere wrote your telephone number as a contact number (a newspaper or magazine competition for example.) and didn't tick a minuscule "Never Contact Me, Ever, You Bastards" box. Your number then got sold for vast quantities of pies to a calling-centre database list, which then sold the numbers onto individual firms.