How do I sign up to GAMSTOP? How do I sign up to GAMSTOP? To sign up for GAMSTOP, visit https://www.gamstop.co.uk and register your details. You can also call them for free on 0800 138 6518. Lines are open seven days a week from 8am to midnight. If you need any further assistance, please see our contact details here. Related articles My name has changed, how do I update this? Contact us Will GAMSTOP close accounts I already have or just new ones? Livescore Bet Squads I don’t want a spending limit... can it be removed?