[Resolved]  Flipkart — unable to make payment with card

I have been trying to make a purchase using debit and credit cards o[censored]nion bank of india and hdfc bank. These cards i have used with flipkart many times before and am using with other vendors (Eg amazon) regularly. I received the message "transaction was declined on the basis of risk checks". This problem does not arise when i use the same cards on a different flipkart account. I do not wish to switch accounts as i have considerably high number of supercoins in that account.
Please advise how to clear this, so that i can make payments as before.
I wish to make a purchase. I tried contacting their customer care and i have subsequently received one standard response after another promising this issue will be resolved in 24 hours, 48 hours... It's now 1 month later!! Appalling response from customer care. No response from anyone with any sensible information. Just the same standard responses. Seems impossible to get to someone who can resolve the problem. Does flipkart want customers???