I think my phone is hacked

Why do you think that? Hacking iPhones is nearly impossible if the hacker had no physical access to your iPhone. If you're concerned about the security of your Apple ID however, see this link and follow the instructions provided If you think your Apple ID has been compromised - Apple Support

It's not. Why not describe the issue you're experiencing so that someone may offer a suggestion or solution.

Why do you think your iPhone has been hacked?