Zoomcar — Cheated by Zoom

I have booked the vehicle from Zoom from 12th August to 14th August. i went to pick up the vehicle on 12th August 7 am . after check-in the app and try to start the vehicle its not started. immediately informed to the host regarding the issue. he suggested me to push the vehicle it will start may be battery went down. i told him i am alone how can i push the vehicle that too i am travelling to hill stations if the vehicle gives trouble in middle of journey then it will became a problem. so i requested to host canceling the booking he agreed for that.. so i am unable to find the cancelation option in Zoom for this i am trying to reach Zoom car customer care but unfortunately i am unable to reach them. so i ended up the trip. please help me to get full refund from Zoom car.