Tata Consultancy Services — passport cover not received through speed post

About not receiving passport cover, it's been a month now. I got a message containing a track consignment number and with a body dispatched successfully
Which i searched for it in speedpostindia site which says it was dispatched to your nearest post office and when i went to post office and enquired about my post they replied they didn't get it even though it shows dispatched successfully. They also said they will reimburse some amount of the amount 450/- i refused and prepared to make a. Complaint. Thus i went to nearest psk and enquired further they said call the number you on the passport application which i dont find. Direct me to find my passport cover.

Thank you.