To send a Private Message you can go to your profile and click on the icon with an envelope. Then you enter the username of the person you want to send a message to and the subject. Or you can go to the user profile by clicking on the username and click on "Send this user a Private Message". -Kira_M.
In cases like this, there's a way to recover your pin number online. Just go to https://myaccount.virginmobileusa.com/primary/forgot-pin and enter the answer to your security question. Then, you'll be allowed to set up a new pin number for your account.