India Post — India Post speed post delay in delivery

I sent an envelope on 25/09/2023 to Rajpura region of Punjab (Banur- 140601).
It is stuck on "dispatched to BO" for several days. It was told to me that from Delhi to Punjab, the envelope should just take 4-5 days.
But today (03/10/2023), it is the 8th day and it is not even "out for delivery" yet.
And I can't find the contact no. of the Banur post office online.
I would be thankful if you could respond back with some information, about the status of my parcel.