Connot Locate or Edit Hidden URLs on my Shopify Store

[HUNTEDFOX]

I have been DDoS'd this past year by a group I hired off of Fiverr to help with my SEO.  It's been a LONG journey our- but I am finally to the bottom of it and I cannot locate these hidden URL's that are still programmed on my store. 

1. HOW does someone add pages to my store that not even I can locate but Google can pick up on and flag?

2. How do those pages also have meta-data/SEO that I cannot locate/edit?

3. How do I delete these pages?

Help?  Anyone?