My iphone is hacked

your phone is not hacked. Those are spam/scam/phishing messages that likely want to trick you into buying something or providing information/credentials. Ignore them and maybe don't visit the sites where this occurs

review this user tip

Scam Pop-ups, Scam Viruses, Scam Receipts… - Apple Community

Dreamboy_626 Said:

"My iphone is hacked: When i use safari sometimes some showed me your iphone is hacked by the users please tell me what can i do iam very frustrating my selt"

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Please Provide a Screenshot:

Try restarting your iPhone, seeing if this pops back up. Take a screenshot. Important: Block out personal information (i.e. Names and eMail Addresses) for Privacy purposes. Use the Photos app to edit the screenshot by covering the personal information with rectangles and such.

iPhone: Take a Screenshot on your iPhone - Apple Support

Call Apple in your region see: Contact Apple for support and service

Contact Apple for support and service - Apple Support

Contact Apple Support -> Get Support (apple.com)

Dreamboy_626 Said:

"My iphone is hacked: When i use safari sometimes some showed me your iphone is hacked by the users please tell me what can i do iam very frustrating my selt"

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Report this to Apple:

Take some screenshots of these messages. Then Forward a screenshot of the as an attachment to Apple using this eMail address: reportphishing@apple.com. In the comments pane, inform Apple of what the attachment is all about: an messages about a "hacked" account.. Use my User Tip: Using the Photos App to Report Scams: - User Tips

this is a user to user forum. You cannot talk via phone to anyone here.