E-commerce Site Indexing Crisis

My e-commerce website is facing a significant issue. Despite having an open robots.txt file and an accessible sitemap.xml, the site has not been indexed for months. The URL is completely blocked. I need an expert to diagnose the situation and provide a solution.

Key Points:
- Site is primarily e-commerce products
- Robots.txt file has been previously altered
- No manual actions or penalties checked in Google Search Console

Ideal skills for this project include:
- Expertise in Google Search Console
- Proficient in diagnosing site indexing issues
- Experience with e-commerce websites
- Understanding of robots.txt file and sitemap.xml