How can I get a refund for excess payment done from my idfc first credit card?

I recently made an extra payment using my card how do i refund it?

For excess payment refunds to existing IDFC FIRST Bank accounts or for amounts less than Rs. 5k, please call 1800-10-888. To receive an excess payment refund exceeding Rs. 5k to an account other than an IDFC FIRST Bank Savings Account, please send a copy of the bank statement.