India Post — Regarding parcel deliver

My item was dispatched on 4th sept 2023 From Rajgarh (Dibrugarh) SO pin - 786611 and its been 18 days since the item has only reached to Bengal. May I know what kind of service is this or a joke. It has to reach Bangalore in 4 days (as said by the office staffs). Today is 20th Sept, 2023. The item is important for me. May I know when I can get my parcel delivered.
Never expected such a horrible service from India post. Also they are not receiving any calls or messages. Nor I got any kind o[censored]pdate for my parcel. My all details has been given by the sender.
Please resolve this issue as soon as possible.
My consignment number : ES[protected]IN