Caching Issue with NO CACHE

I’m hoping someone here can save my sanity. I’m having a major issue with a theme for my site, and no clue where the heck it’s coming from.

I was using the Oprum theme; I created a child theme so that I could edit it until my heart is content, *after* editing the original one. I deleted the original theme so that I could re-install it fresh, as the child theme suddenly started missing things & I didn’t remove them.

After a removal & fresh re-install of the original theme (both through the installer within WP & through FTP), the danged thing is STILL rendering the same changes I made in the DELETED one. I have wiped history, cookies, temp files, ALL of my themes in my theme directory, ANY plugins that might be causing it (I do not have, nor have I used, a caching plugin), and after doing all of that, reinstalled ONLY the fresh theme I downloaded from the website. I just loaded it, and it’s STILL SHOWING THE THEME CHANGES I MADE.

Short of having to completely wipe my site & start over, with a fresh install of WP (which means I lose ALL of my WooCommerce products, etc.), I am at my wits end, and may be driven to drink. LOL

Any help you can give would be monumentally appreciated. Thanks! ??