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 10am to 8pm.If you need any further assistance, please see our contact details here. Related articles Contact us Will GAMSTOP close accounts I already have or just new ones? How can I close my Virgin Bet account? My payment method has changed, how do I update this? I’m already self-excluded, will you pass my details to GAMSTOP?