Zoomcar — Zoomcar charging insane prices for 11 hrs extention

Dear team,
I made a booking with zoomcar with booking Id: JPSN7LQLM

The app is failing to extend booking and when called on a booking made for 7k rs they are charging different prices everytime within the span of 2 hours which is 21k or 25k or 15k, everytime something different which is exorbitant and they are unable to claim the same, they aren't able to explain why they charge so much for 24 hours when the entire booking of 64hours cost me 7k .
There is no basis of this charge and they are purposely postponing the solution to this so i have to pay late fees. Their feature isn't functional as well as mentioned on the attached screenshots.
I also have call recordings which can be shared if required.