Android Phone Security Assessment & Cleanup

I suspect my Android phone has been compromised by a colleague. I'm experiencing unusual battery drain and spotting strange apps and files. Despite my efforts in restarting the device and running antivirus software, the issues persist. I need a professional who can:

- Verify if my phone has indeed been hacked
- Identify the source of this breach
- Remove any malicious software

Skills and experience required for this job include:

- Deep understanding of Android operating system
- Proven experience in mobile security
- Proficiency in malware detection and removal
- Ability to identify unusual patterns and anomalies

I'm looking for a trustworthy expert who can handle this matter discreetly.