RBL Bank — mentally harassing

Getting so many calls from representive asking for payment before due date (Jan 2019) only. When i said i will pay by next week. But the guy is forcing me to pay within 2 days and and talking a like a # with no manners or respect. This is really not a way to talk with anybody. I regret using rbl credit card wish to close it soon. I am afraid to use there card in future. Its like mental torcher the way they are talking i dont think so they are even educated person no value for customer