Fedex — delayed delivery : clearance delay goods are subject to regulatory review.

I received a mail on 12 dec'18 that, there will be delay for delivering my package, with the above statement as i mentioned in the subject,
It is international delivery, my package suppose to deliver on 8 dec'18 but i changed the delivery date to 10 dec'18, and today on 12 dec'18.

If my package is still not cleared from clearance, then how come you suppose to deliver it on 8 dec'18 and now it is 12 dec'18, what kind of rubbish service is this? Don't take those work in your hand that you cannot complete on time.