WordPress Infected Files Cleanup

My WordPress site has suspicious behaviors I cannot fully understand - it denies access to certain sections, including the admin dashboard, and I also identified some suspicious files.

I am looking for an expert who can:

- Thoroughly scan my WordPress site for infected or suspicious files and codes
- Remove the identified suspicious files and codes
- Restore my website to its proper working condition
- Make sure I regain access to all previously blocked sections including the admin dashboard
- Implement measures to prevent future similar occurrences.

Ideal expertise:
- Strong WordPress background
- Proven experience in website recovery
- Understanding of website security
- Excellent problem-solving skills.