Fedex — Waiting for 4 months for delivery.

Address:	Fedex Bangalore
Website:	Fedex

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My fedex package is missing for past 4 months. Nobody from fedex contacted me till now. I have been calling customer care for past 4 months and answer i get was dont worry there is a huge backlog, nothing to worry. But 1 month ago i received one letter in post saying that i have to pay 5000rs fine to get my package if i dont submit documents? It dosent even mention what documents to send and where to send? who to contact? Why nobody is contacting me from fedex? I already submitted KYC and invoice.
My phone number and email id is clearly given in the letter i got today. Why should i pay the fine if nobody is trying to deliver the package to me? Please help me to get my package delivered. Thank you.