Kotak Mahindra Bank — reverse the penalty

Respected sir,
Due to some my personal medical problem i didn't pay the october credit card amount fully rs. 25000. Instead of have i have paid nearly rs.17000. Due to this problem kotak has charged the penalty of rs.1300, nearly. I am nearly three year customer of kotak and this is a my first time of done mistake in payment, i greatly disappointed on seeing the penalty charger for me in next month bill. Please reverse the payment and help for me to sustain in kotak.

Regards
Vinoth kumar. S