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 Compliance Does this replace the normal self-exclusion option on a gambling site? Will GAMSTOP close accounts I already have or just new ones? I cannot speak on the phone, what should I do?