Hi,
I accidentally unlinked my free subdomain. My site which was already live turned into a white page. I tried to to find ways but couldn’t. There was no option visible to restore an unlinked free subdomain which was unexpected! So is it possible? Thanks
We removed the subdomain option this week 
You can go grab a free domain at https://freenom.com
Or a paid one at https://hostinger.com
Reply if you need more help 
I see, so which simply means that the subdomain is only free one time upon registration & permanently deleted once its UNLINKED, correct? Thanks.
Nope, you’ll have to grab a free domain at https://freenom.com or a paid one at https://hostinger.com
How to point domain name to 000webhost.com
And if you want an SSL certificate, have a look at this tutorial
How To Use Cloudflare For SSL
Sorry, I’m confused. I was referring to the unlinked freesubdomain.site88.com not the subdomain.000webhostapp.com. So the freesubdomain could not be restored? Apologies for the clarification.
Oh, I was too a bit confused 
We are sorry, but we removed the free subdomain feature, from now on, you’ll have to either park your domain or point it
Thank you so much for the prompt reply. This will be remembered. 
Cheers!
No problem
Glad I could help