Kairos is made by two people. There is no help desk and no ticket queue — questions go to an inbox and are answered directly.
Write to the address below. Expect a reply within a few days.
Something going wrong is much easier to fix with a little context:
Deleting your account is on the account screen, on the web and in the app, and it takes effect immediately. Requests for a copy of your data, or for a correction, go to the same address as everything else. What is stored and for how long is set out in the privacy policy.