First to you have to know is you have to have $100 before you are able to get a pin no.
Second, check if you already finished the TAX check(if located in U.S.)
you must indicated "not working in U.S." (if not located in U.S.)
Third, After you have reached $100 and you submitted the information before, 15th of the month, you will probably get the pin after 1 month after the issue date..
just be patient and if it's not, just click the resend button and double check you address.