Ola Cabs / Ani Technologies — extra amount deducted by ola

I took an ola cab from anand rao circle to kundalahalli colony. During boarding, the estimated fare was rs. 333. After trip completion, i was charged rs. 513, even though the ride receipt in my app was showing rs. 333. I tried to contact customer care from their app for 5 days, but it was always down. O mailed them as well. After weeks, they gave me a voucher of value same as the extra deducted amount. My complaint is, how can they force me to use my money to use their app again. Giving a voucher is the same as compelling me to use their pathetic services again to get my money back, money which they had no right to deduct in the first place. I want my money back to the original source of payment (Phonepe) instead of voucher. I am providing details below:

Ride id: crn [protected]
Type: micro
Date: 17th september
Time: 1.37 pm
Original amount: rs. 333
Amount charged: rs. 513
Payment gateway: phonepe