Anna University — payment issue and enquiry number problem

As i have paid counselling fee rs 5000 through gateway indian bank. I have received otp and also money was debited from my account. But i didnt receive any receipt for the payment. The payment window in the tnea official website asks us to pay another time bute we have paid already. So kindly request you to examine the problem which was happened and resolve quickly within a day. Kindly fulfill the needs. And also added that contact number you have given for the enquiry is not working it always engaged we cannot able to contact and also we cant able to clear our doubts. Kindly check that also.