Kotak Mahindra Bank — kotak charges excess amount to my credit card - no response from bank

My customer id[protected]
Kotak mahindra bank credit cards team charged me rs.4046.88 incl gst incorrectly as finance charges on 5th september 2019 on one of my credit card account. Already contacted them many times, still no response received from their end. On twitter they are giving unprofessional answers by showing attitude. These institutions are just harrassing customers these days and looting their hard earned money. This is the reality. And now the december comes to an end. I haven't received any reversal of the same.