You can delete an event on Townscript only when it is in the draft phase. Once an event creation is complete, deleting that event is not possible. However, you can unpublish your event anytime if your event is completed or any problem occurs with your event or If you accidentally published your event, you can easily unpublish your page so it's no longer live on the site. Just click on the Green Radio Button in the Event Dashboard.
The below steps will guide you to unpublish your event.