India Post — gift retained by border agency/security in chennai

I sent a sunglass gift to my father from sydney on the 25th feb 20. I reached chennai customs on the 29th feb 20 and has been retained since with the following message, 'retained by border agency/security for u'.

There no further details or next steps as to how to release this from customs and get it delivered to my father.

Any help would be greatly appreciated.

Thanks in advance!