Monetization can be disabled for several reasons. If it's for invalid traffic, here's more info: https://goo.gl/iztFA2 . If you haven't appealed, you can appeal Invalid Click Activity with this form here: https://goo.gl/EWUndU . Hope this clarifies!
After thoroughly reviewing your account data and taking your feedback into consideration, our specialists have confirmed that we're unable to reinstate your AdSense account.