Website Error Fixing & Redevelopment

My website is currently plagued with multiple issues that need urgent attention.

Key Problems:
- Broken links or pages
- Slow loading times
- Shipping and payment module issues: These are critical problems that affect our e-commerce capabilities.

Ideal freelancer for this project should have:
- Proven experience in website development and troubleshooting.
- Strong skills in e-commerce platform management.
- Ability to improve website speed and performance.

I am looking for a professional who can fix these issues and optimize the website for a better user experience.