One simple, open-ended question. Honest answers. No login. No tracking.
No rating scales, no surveys, no checkboxes. Just one question that invites your customer to tell you whatever's actually on their mind.
You see what they wrote, not who wrote it. Customers can share what they wouldn't say to your face, which is usually the honest stuff that predicts a cancellation.
If the customer wants to be told how you're addressing their feedback, they can share their email separately. Wanta relays your response. You never see their identity.