Restore Internal Links

My website's backend was disrupted after canceling an SEO service, specifically affecting internal links. I need someone to clean up the site and restore backend code and technical settings.

Key Requirements:
- Restore internal links
- Clean up backend code and technical settings

Ideal Skills:
- Strong knowledge of backend development
- Experience with internal link structures
- Ability to troubleshoot and fix technical issues

Please note, I do not have a map or list of the original internal links.