Please see:- https://polyfidelity.org.au/about/site/q-a-site/about-the-site/how-do-i-delete-my-profile.html

Membership on this site is free, but we do have running costs for the site,…

We are sorry to see anyone go but if this site is not for you…

Where are you encountering this problem - when trying to join or after joining and…

To change password you navigate to your profile on the little bar at the top…