There are numerous national (de, nl, etc.) eDarling sites, so it’s not possible to give one link. You can find the cancellation option under your account settings easily. Submit the reason why you wish to quit and move on. In the FAQ we read that after cancellation your data will be removed.
Helpful Trick: Removing online data
Helpful Trick: Remove third-party logins
If you signed up for eDarling using a third-party login such as Facebook or Twitter, you probably want to revoke all access from eDarling. Click here to find out how.