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

https://fontkong.com/product/keffie-austina/

File Font Version : 

1. Keffie Austina.otf
2. Keffie Austina.ttf
3. Keffie Austina.woff
4. Keffie Austina Italic.otf
5. Keffie Austina Italic.ttf
6. Keffie Austina Italic.woff