Standard Chartered Bank — a4 interest amount charged wrongly on landmark reward visa card

Address:

380051

My landmark reward visa card last due date 16.05.2018 and i have paid all the pending amount as per generated statement on 16.05.2018 itself without any further delay but sc has applied on a4 interest charge along with gst of 18% on my card. Please look into this and reverse the applied charge as i have paid all the dues amount on due date as per your generated statement.