Uploading Custom Fonts

Hello, I have tried various plugins to use a custom font for a clients website and for some reason I can’t figure out how to get it on there.

The font isn’t on google fonts and font uploader isn’t covering all of the text I need it to.

If someone could provide me with a link or some info to the best way to get the fonts I need up on the website, that would be greatly appreciated!

Thank you!