Kotak Mahindra Bank — credit card fraud- kotak bank is a robber

Just few days ago i did more than full payment of my kotak credit card and in fact my remaining balance is in -600+. And suddenly they have blocked my card and also robbed my extra money. They are big cheaters. They replied in inbox that due to internal guidelines they have deactivated it. I have a good credit score plus i have done payment of more than full amount.
They don't even have decency to return my extra money. Money doesn't grows on tree, its our hard money they are stealing. I curse them that may their flesh rot but death doesn't come to them, may they have all the food in world but remain unable to eat, may they have no generation to continue their bank. May this bank be dust, may all people spit on these robbers.

Please nobody open kotak account and don't take their credit card. They are doing fraud and i think they are also going to steal money from india and run away like vijay mallaya. You guys deserve to rot in hell.