I made a horrible mistake. I edited things in the main theme and then discovered about child themes. I wanted to 'undo' the changes I made and start over, so I deleted the theme and tried to reinstall it. When this didn't work, I deleted everything, trying to reinstall it, but nothing worked. I can't go to my dashboard (The page cannot be found) and my site says 'Directory Listing Denied.'
As you might understand I am not very good at coding and things like that, and I have no idea how to solve my problem. Is there a way I can reset everything, or maybe delete the whole blog and start a new one? Because I did pay for my host and it would be such a waste.