If you have been experiencing issues with your bank and your complaint has been rejected without a satisfactory response or no response at all, you can escalate the matter to a higher authority within the bank branch and then to the RBI Banking Ombudsman. Common issues might include problems with opening or closing bank accounts, uncredited fixed deposit maturity proceeds, unreversed demand drafts, or unresolved credit card cancellations. But if your bank does not address your complaint promptly, you can escalate the matter to seek resolution.