Fedex — regarding kyc clearance by the customs

Tracking no:[protected]
I ordered a product from alibaba which is actually for personal use but the seller mistakenly wrote on the description as sample products. As per the seller's description now i need to submit my iec and gst no. Which i don't have as i am not a business person and not aware of this. So i called up the fedex customer service, they told me to submit a hand written letter to the deputy commniosner of the customs, customs courier cell to clear my package with my personal identification information. So i submitted my pan card information, then i received an email from kyc fedex stating that my documents are incomplete. I resent an email to [protected]@cogenteservices.in with the letter attached to it which is directed to the deputy commniosner of the customs. But the customer service told me that the issue will be solved on the same day.
Dear whoever is in-charge of this please acknowledge my complain and solve this issue as soon as possible.