Flipkart — Flipkart pay later and gift card

In may I have ordered some items from Flipkart pay later option so some of items where cancelled from seller side only and amount Fully was not refunded to my amount so I have called them but no response from their side and they said monthly adjustment will be done so I kept quiet but from June every month they called in my house and irritated my parents to pay the amount when my amount is not refunded fully why should I pay the amount, from last month i am not able to shop anything in Flipkart so I want my problem to be solved which this customer care people are not solving and no positive response from them even..
Aug 10 i have added a gift card for shopping from that also i am not able to shop . I called Flipkart customer care to delete my card that also no reply from them positively .
What i do now ??