If that doesn't do the trick, you should perform a full restore, especially considering you cannot delete/reinstall the features you are having issues with. As long as you have backed up very recent data, yesterday's iCloud backup should suffice.
Hi
Have any of you guys experienced the same problems as me?
1. Swipe up camera gives me a black screen... i have to enter the camera app (thus entering my access code), to take pictures.
2. The swipe down calender is way to zoomed, and once i've swiped it down, i can't swipe it up again... i have to press the button.

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