Fedex — Delay in clearance for mismatch in kyc document

I booked parcel from china with tracking Number:[protected]
now in status of i can show clearance delay from 3 days, i already submitted kyc documents, and regarding this already talk with customer care agent, they tell me for mismatch in GST and IEC, but not in detail which kind of mismatch and how can i correct it, please help me, Thanks.