Mumbai Customs — package being held

hello sir/madam
i sent a parcel from UK to Goa, my parcel number is BY2502. OR EE[protected]GB , NOW MY PARCEL IS BEING HELD because they want proof of purchase and other documents, now my problem is that the items that i sent are gifts to a friend containing 3 very old mobile phones and 1 old laptop that i used to use.. now my problem is that i don't have the receipts for these items as they are very old. the mobile phones i don't purchase because they are free to me when i sign a new phone contract and also the laptop is so old and with many problems that i also don't have any receipts or even the box that it came in.. please help me . I've spoken to customs many times and all they say is i need to send the documents?? even when i say i don't have any and also the language barrier was an issue .. please tell me what i need to do to release the package??