Who to call if iPhone 7 is presumed to be hacked ?
Apple contact if potentially My wife is being hacked
iPhone 6 Plus, iOS 10
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No. Apple has no Anti Hacking services.
Note, that there is no known method of remotely hacking an iPhone. Its extremely unlikely the actual iPhone was hacked.
More likely, that her Apple ID was compromised. See here: If you think your Apple ID has been compromised - Apple Support
Outside of that, perhaps if you explain what is going on, someone may be able to provide more specific advice.