After working on my site for a while, in Wordpress dashoard I changed URL as a test and after it I cant acess my site anymore

So on the 000webhost dashboard it says my site is online and working
but when I click on the link its like this for past 2 days

Bare in mind this happened after I played with changing the URL in wordpress dashboard, sadly I cant acess it anymore either through /wp-admin.

I’d really need help in recovering access to my site and Im thanking you in advance.

If you want to use you need to buy it first.

Thank you lots, this helped, hope you enjoy your day.