Ola Cabs / Ani Technologies — Ola Cabs - Harassing by making calls to force repayment

I had booked Ola Cab on March 7th, 2019. After the trip at 4 am, Driver showed ola app prompting for cash payment (Rs. 3808). Upon which I made the payment to driver by PayTM and settled the amount. However, Ola Postpaid amount was also deducted for the same trip (that i didn't notice, because i didn't use ola app after that). As soon as I realized that ola app is asking me to pay again, i immediately emailed ola support about this issue, and also talked to them on call and update that i have already paid the amount to OLA driver with proof (paytm invoice). and when the issue didn't resolve after multiple attempts, they asked me to uninstall the app, as they have no way to block my account from their side. After that, I started receiving emails/calls/messages for non-payment of dues. I kept telling them that an issue is waiting to be resolved. I have already made the payment to the OLA driver. however they kept calling me incessantly about non-payment of dues. They have been calling me/emailing me/messaging me for more that ten times a day. they literally threaten me like goons, that they will come to my house to get the money and will file a legal case. It's been almost a year while tolerating this nonsense behavior from their side.