Settings → Profile → Delete account. The account and its data are deleted straight away.
Open Settings → Profile, scroll to the bottom, press Delete account and confirm with your password. The account is deleted straight away and can’t be restored.
Your profile, listings with their photos, favorites, saved searches, selections, bookings and reviews are removed. Messages you sent stay in the other person’s inbox without your name. Details on what is deleted and what is kept are on the account deletion page.