Dream11 Fantasy — delay in refund

Amount of 876 was debited on 28th march 2019 from my bank account and no amount was not added to my dream 11 account. Dream 11 claims it to be a failed transaction.

But bank verified it to be a successful transaction stating that it claimed refund from dream 11 but was denied mentioning it to be a successful transaction. Still no refund has been made. It pains me a lot.
I had made several complaints but no action taken yet. It has been more than 3 months.
Kindly look into the matter and do the needful.