This website should be a help to get you pointed in the right direction! If you have any questions, your best bet is to contact your carrier and ask them what your next steps should be to get your unique PUK code.

Mobile PUK codes how do find my PUK code

I think that you need a PUK code to open the unit
contact your service provider on another phone , provide proof of ownership of the account and they will give it to you
enter that into your phone and then your PIN number
if it still shows a code error take it to a phone repair shop