Wordpress upgrade failed, had to delete website, now can't create it again

Hi there. I had a wordpress/woocommerce website hosted at itisnothard.000webhostapp.com

I hadn’t touch it a few months and now I was asked by a customer to show how an ecommerce hosting worked. I logged into the site and noticed that wordpress needed upgrading. I proceeded with upgrade (after a backup ) and things went south. It kept going into this cycle of the initial site setup and never letting me into the wordpress admin page.
I tried what I knew to get to the wp admin page to restore the backup (I use updraft plus). Eventually I gave up and decided to delete the site, create it again and restore. However after deleting the site, I try to create it and it says it already exists. Can someone delete it completely please?

I want to show a customer that they can use 000webhosting but I can’t show them the demo site. Please help.

Thanks!

The same name can’t be used again, it does tell you before you hit the delete option below the button