If you want the full version and license for commercial use,
you can purchase here :

https://fontkong.com/product/sebbastian/

File Font Version : 

1. Sebbastian.otf
2. Sebbastian.ttf
3. Sebbastian.woff
4. Sebbastian Italic.otf
5. Sebbastian Italic.ttf
6. Sebbastian Italic.woff