WordPress iFrame Injection Fix

My WooCommerce website is experiencing an unknown iFrame injection issue. We're being redirected to external sites from the homepage, which is disrupting the user experience.

I suspect this started after I recently installed a new plugin/theme. I'm looking for an expert who can:

- Identify and remove the iFrame injection.
- Fix the redirection issue on the homepage.
- Ensure the site is secure and prevent future injections.

Ideal Skills and Experience:
- Strong experience with WordPress and WooCommerce.
- Proven track record in resolving security issues, particularly iFrame injections.
- Familiarity with plugin/theme installation and potential conflicts.
- Knowledge of website security best practices.