My iPhone was hacked and they taken my photos and card details

If your device is not jailbroken and you have not provided your passcode or Apple ID password to anyone, then it is not possible. No one can hack your device, unless you have given them permission by supplying them with this information. If you feel your Apple ID has been compromised by mistakenly giving out personal information, follow this Support Article:

If you think your Apple ID has been compromised - Apple Support

How do you know that they took photos and card details? Just because they displayed a message on your phone claiming that they had hacked it – using e-mail, or Web pages, or messages, or any other type of communications that your phone might support?

Those sorts of claims are usually lies, from scammers trying to work you into a panic, so that you will contact them to "fix" things and fall prey to their scam. After which they will take your money – or information to use to rip you off later.

If you're using a computer, scammers may try to get you to install remote access software on it … to let them into your machine.

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

That is unlikely in the extreme.

Why do you think this is true?

saravanan23 wrote:

Yah is it true…

Without my knowledge how could they taken my card details …

From your phone? They can’t.

Look for another explanation.

No can do. It did not happen from your phone if you have not given anyone access to your Passcode.