I didn’t self-exclude via GAMSTOP but it says I did. Who do I contact? I didn’t self-exclude via GAMSTOP but it says I did. Who do I contact? Contact GAMSTOP via their website here or call 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 Contact us Can I reopen an account once it’s self-excluded via GAMSTOP? I’m already self-excluded, will you pass my details to GAMSTOP? How long is the self-exclusion for? What happens to my account after I've set a self-exclusion?