Ola Cabs / Ani Technologies — Night charges levied

I took an outstation ola ride on 21/10/2020 from Delhi to gharsana (a town in Rajasthan). We reached there before 12 am the same day, and while generating the bill, it could not processes, and the bill could not be generated. We had completed the ride the same day. In the morning, the driver came and asked for the ride money. Bill was generated in the morning of amounting to Rs. 12231 including night charges whereas the bill amount should be Rs. 8500 without night charges. I don't know how kilometres got increased and why night charges were included. We are not getting any support from ola. We had called them several times in a month till day, and every time we call, they say the refund will be done qithin so hours but till date no refund received. I am being mentally harrassed by them and everytime they promise for call back frm senior whicb i never received. And they always put call kn hold for hours and then disconnect.