Fix WordPress Contact Form Issues

I'm looking for an experienced WordPress developer to help troubleshoot a couple of urgent issues on my site.

Key tasks include:
- Fixing error messages on the Contact Form 7 plugin
- Resolving issues with pages not updating on mobile browsers

Ideal skills and experience:
- Strong expertise in WordPress, especially with Contact Form 7
- Experience with mobile responsiveness and troubleshooting WordPress site performance issues
- Ability to diagnose and fix plugin conflicts and theme issues

Please provide examples of similar work done and your approach to resolving these types of issues.