Fedex — Shipment Stuck with Bangalore customs-Fedex not taking care

My shipment which should reach last week Thursday(JAN 13th) is still not reached and with Bangalore customs. The initial status was Commercial Invoice missing but the shipper sent the commercial invoice which might have missed during the transport. I sent the copy of the commercial invoice on JAN 13th itself but the FedEx team has not sent the invoice to the Customs team till JAN 18th which I was shocked when I came to know. The customer care team is so rude and they don't even try to get the information from the FedEx customs team. FedEx customs team is not all following up with Bangalore customs team. US FedEx is far better in terms of operations compared to India FedEx.
I request to follow-up with the customs team and release my shipment ASAP.