I have an iPhone 4 with iOS6 & I have a calendar event that has a runaway duplication issue. There are(@last count) 86 duplicates per day through 2014! As I try to delete it, it locks up the calendar & grows in #'s. I can't turn off the calendar in settings it gets stuck in"turning off calendar". I've deleted & restored the phone to factory blank & when I loaded the back up it brought the run away calendar ever with it. I can't turn off the calendar in iCloud either, it gets locked up & eventually times out. I've tried changing the end date, changing it to never repeat, & so on resulting in a lock up & time out. Several hard resets too. Do I lose all of my contacts & info & wipe if clean again & abandon my corrupt back up?