India Post — I'm complaining about delay in delivery or no status update about parcel

I have booked a parcel on 24/04/2018 from ratlam ho (457001) to purnia, bihar 854301, on 25/04/2018 it was bagged to barauni but after that there is no update about this. I have already registered a complaint regarding this with no. [protected] & also personally sent an e-mail to m. P. Head post master & bihar post master. But still there is no solution or no reply. I hope you take this case sincerely or solve this.