I wasn't talking about complete complaint resolution or closure within a month but rather just an update for the new complaint.
I have seen a lot of cases where people at least received an update regarding their complaint from the bank within a month, but of course, a full-length of complaint timeline till its closure will probably stretch to many months, involving multiple back and forth of communication.
I am not sure how long it takes just to receive the first update itself and I think it varies among people, some might get it in a short time, and for some it may take months.
In 2023, I had an issue with ICICI, and I didn't even wait 30 days and made a complaint through CPGRAMS, it was forwarded to RBI and they forwarded it to ICICI.
Literally in one day, I got a call from their headquarters and by the next day, they resolved it. The whole thing took 2-3 days max.
This is the first time I went to RBI BO directly and It's been a month since hearing even a single word from the bank.
So I guess its quite normal to take such time if directly went to RBI BO.
I will wait for a month and will go through CPGRAMS instead.