Bharat Sanchar Nigam [BSNL] — Absurd billing

Address:

B GARDEN/ SHIBPUR AREA, HOWRAH-711103

I got two post paid connections vide Nos. [protected] and [protected]on 24.09.2022 from BSNL OFFICE at B GARDEN, HOWRAH. the 1st one was used in little span from next day locally till 5th october, 2022 and thereafter, it was used in kashmir till 12th october, 2022. I can not understand how the bill was generated on 5th october amounting Rs.376/- which was paid on 25.10.2022 as on due date.
not this, the 2nd SIM was truely used from 06/10/2022 in kasmir till 12/10/2022 and then upto last week locally. my question is that how its bill has been generated on 05/10/2022 with a high amount Rs. 392/- that is prior to use.
please arrange to supply call details of these two post paid connections for which such enourmous bills have to be paid.
your reply is solicited early. My mail address is: [protected]@gmail.com