DHL Express India — 2 items from the same website but DHL charged more customs

Hey,
I just recently ordered from StockX.com
2 items
1 shoe and 1 hoodie both being Equal in price ( 120$ )
Both items came from Ups and DHL respectively.
To my surprise I paid 5600 as duty for my Ups order and DHL people called me and told me they have cleared my customs and now I’m liable to pay them 9800 ₹ duty on a import of 9000 ₹ hoodie .
They never even asked me before paying that duties
NEVER order any of your shipment from DHL.
Them paying customs on your behalf is the biggest scam