India Post — post not delivered after 3 months

Address:

Ahmedabad, Gujarat, 380009

I had sent 3 rakhis in an envelope through normal post before rakhi (Around 15 aug) from ahmedabad to pune. My brother did not receive it till now. I had also made a complain before this but no action was taken.

I had also sent 2 more rakhis along with the former to surat and rohtak respectively. The one in rohtak was received before rakhi. However, surat one was received 10 days after rakhi. Pune one is not received till now.

It was sent thru indian post at new cloth market, kalupur, ahmedabad to yerawada, pune 411006.
Kindly check why is the service so slow and why is pune one not delivered.