Airtel — bill payment cheque submitted but not updated by airtel

Address:

New Delhi, Delhi, 110065

We have made payment of the bill vide cheque. Cheque was deposited at airtel santnagar branch new delhi. But the payment is not updated in airtel records and the amount is also not debited from my bank account. I want to put a stop payment to this cheque and issue fresh cheque but despite of my repeated visits at airtel branch office, various calls to their call center and emails to the mail ids provided by airtel, there is no reply of our emails. They are not confirming on mail what has happened with the cheque. Is it not airtel's responsibility to at least reply to our mails??? Extremely bad service.