I tried resetting,
Did you try resetting to factory defaults?
Tap Settings > General > Reset > Reset All Settings
You won't lose any data as a result of a reset.
Then restart the iPad.
Hold the On/Off Sleep/Wake button down until the red slider appears. Slide your finger across the slider to turn off iPhone. To turn iPhone back on, press and hold the On/Off Sleep/Wake button until the Apple logo appears.
iCloud is unrelated to the + sign for Calendars. iCloud is for syncing and storing data.