StashFin — excess payment made but company denying

Address:	New Delhi, Delhi, 110059
Website:	www.stashfin.com

I was supposed to pay the emi of rs 11187 on 1st august. They have debited rs 3965 on 1st aug. But rest amount not debited. So to avoid fees i have made the payment of rs 7222 manually on 2nd august from their app only and received a confirmation of successful payment. Again they have debited rs 7222 from my account on 2nd august. And now while querying about payment they are denying that they didnt receive any extra payment. Please help me to refund my rs 7222.