Hi Governo,
in general your links were incorrect since beginning.
- You should add every single Page (from SPPB) to Menu as separate menu item. Then copy URL alias and use it in buttons etc. Otherwise you have mess with links.
It's not possible to change links from SP Page Builder, becuase this is not SEO/SEF component.
Just do what I suggested and should be OK. I hope you use .htaccess and SEO settings from Global Configuration.
- Create a new website sitemap.xml and send to Google to reindex your site.
- If you afraid of losing position in Google - make 301 redirects from OLD url to new URL.
Points 2 and 3 - are typical SEO tasks, beyond our support, many guides online.