HDFC Credit Card
Abusing & threatning calls

I have HDFC cerdit card of limit Rs. 20, 000/-. Im using this card since 4 years & regularly paying the payment. Now I was ill for last 1 1/2 month so that I couldn't able to pay. Now I request the bank that I need about a month or month and a half to repay or settle the balance, the calls Im recieving from the bank are threatnig, apart from that, they have been using very abusive language. Kindly Help me. Thank you.

Vijay