Firstly head over to
https://www.hostinger.com/special/000webhost?utm_source=000webhost&utm_medium=frontend&utm_campaign=moderator
Signup to any package on Hostinger and launch the migration tool
Login to your brand new hosting panel via https://hpanel.hostinger.com/
At the top right of your screen select the two arrows pointing towards each other (Migration requests)
Add request and fill in your previous hosting details in this case your 000webhostapp URL.
OR Raise a support ticket by hitting the purple button bottom right or accessing https://hpanel.hostinger.com/help should you face any delay or difficulty
OR Use Live Chat to get an agent to do the leg work with you 
You will no longer use 000webhost - always login to Hostinger to manage your website on premium services.