Website now not supported through wordpress though it was at one time

I have my username and password, however I am unable to access the WordPress edit website URL for my website: lexendhomelessness.com. When I looked at the website earlier today, I saw the entire website navigation menu at the top is gone so I am not sure if there is something going on that needs to be reset, and now I had to create a new account and it says our website it not hosted with WordPress. So any help would be appreciated.

Self-declared URL: lexendhomelessness.com
Jetpack: Unknown
WP.com: Unknown