Zoom Car — charging illegally from my credit card

Hi i have taken tiago on subscription from zoomcar for a period of 36months. On a monthly installment of rs 11198.

In the month of july (Aug invoice) they have taken back the car on 8th saying documents are missing from the car upon which i will be liable to pay for usage of car for a period of 7days ie 1st to 7th amounting to rs 2528.. (Rs 11198*7/31)

When the car was with me for the 1st 7days of july it had earned a revenue of rs 1589 which will be deducted from rs 2528 and thus bringing the net subscription fee to rs[protected] which was supposed to be debited from my credit card but zoomcar has deducted rs 9609 resulting in rs 8670 in excess which has to be returned back..

In the month of august (Sept invoice) though the car was with them for the whole month they have charged me again rs 3228 for no reason because they have taken the advantage of charging via instapay from credit cards..

In the month of september (Oct invoice) also the car was with them the whole month and now they have sent me a message saying they will be shortly deducting the subscription amount of rs 11798 (Gst hiked 11198+600) shortly..

I have complained regarding this several times to useless zoomcar customer support desk, but when ever i call they promise to refund the amount in the next invoice but till date i have not received any refund..

I have also been informed that the car has received all the lost documents but still they are least bothered to deliver my car even after 3 months of downtime..