E-commerce Site Redirect Troubleshooting

My e-commerce website has been facing an issue. When I attempt to open the site, it redirects to an href site. I'm not sure if this is affecting all pages or just specific ones. No recent changes have been made to the website prior to this issue.

I need an expert to diagnose and fix this problem at the earliest convenience. Ideal skills for this job include:
- E-commerce website development and troubleshooting
- Familiarity with website security protocols
- Experience with redirect issues

Please provide a brief overview of your relevant experience when bidding.