Hacked iPhone
No, if you haven't jailbroken your iPhone, it's not possible.
See the following Apple articles:
Manage and use your Apple ID
Manage and use your Apple ID – Apple Support (UK)
See who has access to your device or accounts
See who has access to your device or accounts – Apple Support (UK)
Security and your Apple ID
Security and your Apple ID - Apple Support
Recognize and avoid phishing messages, phony support calls, and other scams
Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support
- If you receive a suspicious email or SMS text message that looks like it's supposed to be from Apple, please email it to reportphishing@apple.com
If you think your Apple ID has been compromised
If you think your Apple ID has been compromised - Apple Support
Block phone numbers, contacts, and emails on your iPhone, iPad, or iPod touch
Block phone numbers, contacts, and emails on your iPhone, iPad, or iPod touch - Apple Support
For more support and assistance click here