Have I been hacked

No, you have not been hacked. The website you were on was paid to show you that advertisement and it was meant to scare you into downloading some software that claimed to fix a problem you do not have. That is why it took you to the App Store.

There is nothing you need to do.

Yobigbara wrote:

I clicked a link on a Site by mistake and it said I got hacked and then in took me to the App Store have I been hacked

Sorry there is no hack/malware/virus/spyware for a non jailbroken phone.

clicking on a link doesn't hack your phone.

Yes, you did get hacked.

Your phone, however, is fine.

The advertisement did exactly what it wasn’t intended to do too; to influence or hack your thinking. To plant an idea.

Your iPhone, however, was not hacked.