Login at
https://www.freephoneline.ca/updateAccountDetails. Select "Close Account".
Alternatively, you can submit a ticket:
https://support.fongo.com/hc/requests/newChoose "My Account Inquiry" for the final issue type.
You will lose your VoIP unlock key, Freephoneline number, and any potential World Credits you may have.
Volunteer moderators and users don't have access to your account. We don't work for Fongo.
Support staff is not obliged to respond here.