Gain access and an control

This is our club website I found on the record.
864035.toastmastersclubs.org/
The person who might have the administrative privileges to the club website, is long gone and we don’t know this person. How can we get access and control our club website? Otherwise, Is there any way to delete the website to start with a fresh one?

See support.toastmastersclubs.org/doc/item/w...-no-longer-available for instructions on appointing a new administrator.