Well these apps really can't be gone, UNLESS your device is jailbroken.

Let's assume you are NOT jailbroken, in that case a reset of your homescreen should fix you right up. First restart your phone by holding power and home (or power and volume down on the iPhone 7/7Plus), THEN try the search again, swipe down, then type Settings, then General, then Reset, THEN Reset Homescreen layout. Also try using Siri to bring up the settting. "Open Settings"
IF you are jailbroken then you need more advanced help than I can provide.
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