To unsubscribe from general emails from Surkus you can go to: Profile > Notifications. You may still get a few emails within the next 48 hours.
You can also use the 'unsubscribe' link in the footer of the marketing emails.
Alternatively, you can go to your Profile > Event preferences > Turn off any event types you know you will not go to or be interested in. This will limit the requests from Surkus to only those you are interested in.