India Post — Don't known about customs charge

Address:

Imphal

Hello sir /medam,


I buy a used 2nd hand mobile phone from ebay US online shopping i already pay on online that mobile phone is sending from ebay USPS courier service to delhi india post that is departed at Delhi on 19 Nov 2023 and Delhi customs clearance processing completed after completed the processing they sent to kolkata foreign post office on 25 Nov 2023 kolkata customs clearance completed after that percel is reach in India post office imphal on Dec 6 and 7 nov that parcel is departed in delivering service centre but they don't deliver because they told me that pay 20k rupees for kolkata customs service charge for that parcels if i haven't pay they don't deliver my phone i talk to kolkata customs service they said to me that for talking to Imphal HO but they said to me firstly talking kolkata customs sevice please help me for deliver my parcel .
Tracking id :CY[protected]US.