Update my existing website (ANGULAR + NODE.JS)

Looking for a good experienced developer to update my existing website.

http://education.visionai.me

Its build on NODE.JS & ANGULAR I think (not a developer so can't confirm)

I would like you to update the following.

1) my old company name is falconeducation and now i have changed it to something els

so I want to change name from all places

2) About us (as you can see about us page is not working) but in menu its there so no idea why its not showing

3) login and signup doesn't work (no idea why)

4) Testimony if you have seen my website there is testimony on homepage but no place where people can add their data

so I need a page where they can come and fill the form which will automatically add (show) in my home screen

NOTE : PLEASE DO NOT DIRECTLY CALL OR WHATSAPP ON THE WEBSITE NUMBER
(THOSE WHO CONTACT WILL NOT BE ENTERTAINED)