Zoomcar — 8 Seater booked, turned out to be 7 seater when starting trip

Booking id : JSPN73VQW.
Had booked an 8 seater car from zoomcar.com. 2 hours before when customer care made me talk to the owner he confirmed it's a 7 seater not 8. Obviously I couldn't go ahead with 7 seater and when I approached customer care to cancel my booking with full refund they said 50% amount would be deducted. This was really a bad taste in mouth as my family trip with family who had travelled from abroad got cancelled and on top of it I had to pay 50% penalty for no fault of mine. We had further booked tickets for hotel stay and theme park worth Rs 15000 which would go waste now. Since I booked the trip I literally called zoomcar customer care atleast 15 times within a space of 12 hours to verify profile and then to resolve problem of 7 - 8 seater, several times customer care cut the call and had to redial. Overall very bad experience.