I haven’t tried switching themes. I’m a bit afraid I’ll loose everything.
Hosting providers said they can only restore a version from May 2017 (around the time I created it), so no help there.
Anyway I’m re-creating the website manually…
Thank you Ex.Mi and Rey Den Nalasa for your recommendations!
I’ll check both options and do the backup asap!
Unfortunately I don’t think I have. Weirdly I never thought of backing it up!
I will definitely learn how to do it now!
Thank you, I just wrote to my hosting provider and am awaiting their response.