Have you tried axis bbps, stanchar , zavo ? what's common in these ? All three uses same payment gateways - and in first week of AUG some people complaint against the bank for not using valid mcc's >> after that suddenly IDFC stop permitting there transactions in this payment gateway ( used by zavo , stanchar , axis bbps) - and till today you can't do any transactions on these PG .
Confirmed by IDFC social media care team !!
According to them they are Currently reviewing it ......!!!