Hi Emilio. You'll need to have at least one of your account related information (i.e email / username and any recovery options, if set up). Once you have that here's how you can regain access: https://goo.gl/dYcTmt . Hope this helps.
If you're referring to monetization being disabled, it can be for several reasons. Here's more info about monetization being disable and what you can do to get back on: https://goo.gl/cNar2n . Hope this helps.