Ola — Charged double payment. Online payment and cash payment also for same ride

Today I have booked a cab from kuruli to Erandwane Pune. I have already paid for the ride by phonepe app. After reached at location driver asked me for cash payment, I have paid the amount as per request of Ola customer service executive. He said your only payment will be refund in some time. But still I didn't get my refund. Please help me someone in this.