Lots if people lost their enderchests and pv's because of some glitch, but no the servers did not reset.
It did not. If you would like your money refunded, http://www.mineverse.com/threads/op-kitpvp-recent-balance-chests-clearing.86848/ will most likely help you.
Go here to refund your MONEY ONLY, though you need evidence of the balance - http://www.mineverse.com/threads/op-kitpvp-recent-balance-chests-clearing.86848/
The answer to your question/solution has been stated: Kitp PVP and OP PVP were having issues with storage and such, causing things to not save, if that makes sense. It should be fixed now. If you did experience issues with losing things there, refer to this thread. I'm going to close this, feel free to reach out if you have any more questions.