Firstly so sorry about this. I can only imagine how frustrating this is for you. As someone said once your cumulative timevin a country is more than 6mths in the last 10yrs u hve to produce one.
I would recommend sending an loe with the attached email from fbi to them and see what they say. Mostly if u dont get another extension, they will process n continue unto a decision with what they have minus the pcc. You may not want this to happen as it will then be based on the reviewing officer discretion. But contact them 1st see what options they provide you with.
Secondly, fbi needs to get you more information on your application. Maybe you may get a letter in the mail, not sure. But you need to probe them to tell you what the issue is with your application. A little bit of what I understand is your package after delivered by the courier to fbi goes through security screening before they are opened and uploaded unto the system. Now what that security screening entails and the extent, i can not say. But if something were to happen to your package during screening, they need to tell you? Did it get lost, or hold up for additional screening, etc as having an accurate info can help you with your request to cic. While you are pesting fbi, reach out to the courier you used to get evidence of delivery and who signed for it (usually a J L Hurst -atleast he signed for mine). This will help you walk your way into knowing what happened by elimination. If it delivered, then next question is could it have been contaminated or compromised during of after delivery.
Lastly while you are trying to gather evidence to make your case at cic (cause u will need something to convince them to extend considering this will be your 4th request), fbi needs to tell you what you should do next without delay. Send in another application or whatever but they need to tell you now. In the meantime, start putting another application together incase you have to send another.
Again really sorry about this. The 3mths wait is unbelievable pain but even worse is getting to that stage and stories like this pop up. Hopefully all goes well.
