Bangalore Water Supply & Sewerage Board [Bwssb] — RR NO- W[protected] Tranfer of name - Bangalore MEI Colony laggere- authorities harrassing

Dear Sir
This is with respect to the change of name from our father's name to my sister's name and my name
My father had taken the kaveri connection by paying the requisite fee and was issued with a challan in 2008 or 2009. He had been paying the water bill promptly from the date of the kaveri water connection.
It's so unfortunate that my father passed away in 2015.
Post that my mother too was ailing of cancer and she too passed away in 2020.
Now as my sister and I are the only Legal heirs of our parents we got the joint khatha transferred in our names.
As we have the bwssb connection still in my father's name we approached the bwssb office in our jurisdiction for change of name in the bwssb bill
Initially they asked us to submit the sale deed copy
Khatha copy
Latest property tax receipt copy
Aaadhar copy
Latest water bill
Family tree
And declartion that we are thr legal heirs.

Later when we were about to hand over documents they are now asking us to give the challan for having paid amount towards kaveri connection.

Our father was a person of high dicpline and what ever he has spent he has a record from 1947.
Unfortunately when we checked all these records could not find the customer copy challan with respect to kaveri connection.

And when we told the concerned authority that the same is misplaced and not found in our records they are concluding saying that we haven't paid the money towards our kaveri connection and They are pressuring us to pay the same again for which we hv already paid and telling us to pay connection charges that is levied as on date

Our question here is without paying the requisite fee how could the bwssb authority give us the connection.
And if we had not paid them then they shud hv issued us a demand letter for not having paid.
My father has been paying the kaveri water bill up-to-date and every bill is filed

Request the concerned to look into the same and resolve this issue and not demand the customer copy challan and accept the other list of documents and change the name from our father's name to my sister's name and my name

Regards
Sowmya