Punjab National Bank Housing Finance [Pnbhfl] — unethically taken my money

Dear team,
I requested an top up against my home loan hourai[protected]. After an pnbhfl executive confirmed that loan extension is approved and a service charge of rs.3600 is required so i submitted the cheque. Later they said loan is not approved and if the cheque is encashed they will revert the money. The amount was deducted on 17th of may18. Ideally it should have been reverted automatically when my application was rejected or was not approved. Though i have written first email to raise this issue on 4th of june18, i had to write numerous followup emails and made multiple customer care calls, very few of them entertained. On 4th sep i received a call from another pnbhfl executive that they are working on the reversal and issue will be resolved in 1 to 2 days, but after 5 working days back i received an email saying that it was a processing charge and cannot be returned, even though the loan was not processed as my application was rejected initially.

I am fed up with this kind of customer service from such a reputed financial institute. I have also filed a rti for pnb, after 1 & half month they have replied pnbhfl is now a different entity and rti doesnot cover it.
More than my money, i don't entertain unethical practices and i want my money back.
And also pnbhfl has increased my home loan interest, which is fine as it is a floating rate loan, but there should at least be an intimation email. I could not find my current interest on the portal as well.

Thank you,
Subrat mandal