India Post — international speed post not delivered/missing

I have an international speedpost parcel being sent to me from uttam nagar, delhi india to glenfield, sydney australia
Tracking id is: ed[protected]in. The item was shipped on 29th august 2019 and was due to be delivered last week, however it has not arrived. The tracking advice has shown as “item dispatched” from uttam nagar s. O. Since 29th august with no further update. I raised a complaint to india post with complaint id [protected], however there is no response on this. Furthermore the sender and i tried to call indiapost to get answer and also reached out on twitter, but still no help. We tried to call parcel help on [protected], but no one is answering that phone number. I contacted the mail authorities here in australia so they can assist in investigation. Can someone please contact me to advise where the parcel is and ensure prompt delivery of the parcel? My next step with be to contact the india media for assistance with the matter.