DHL Express India — Excessive duty/tax for clearance

My DHL way bill no.[protected] held in Kolkata for duty/tax payment of INR 23706.30. The parcel contents some ordinary canvas for painting, photographs and documents., The declared value according to the shipper commercial invoice is $600 and purpose is parsonal effects. The documents of proof already submitted before the clearance process in INDIA. Then what is the reason for calculating such heavy duty charge for consignee.
Previously I received same kind of shipment with declared value of $200 without any duty charge in the month of February 2021. Would you please reassess the duty charge according the content material and commercial invoice that already submitted.
Thanking you.

With Regards,
Anupam Halder
Kolkata 700131
W.B.
India