Zomato — undelivered food not refund

Address:

111/A Matheswar tala road Nearkafulook resurent kolkta-46, Kolkata, West Bengal, 700046

I have booked a order([protected]) at zomato on 24/06/2019 and the food was undelivered due to my mobile fall down in water and after it was not reachable as usually.
I have already spoke with consumer forum and my case id is 1403511 and the zomato person, zomato person told me yesterday 26/06/2019 they will not pay any refund on behalf the order.
My phone was suddenly fall in water and then I quickly set up the sim on my another phone. In the time the delivery boy call me and my phone was not reachable and when he just reject my food he was just 300 mtr distance but he told me if I have to pay 50% of the billing amount then he will delivery the same, otherwise the amount will be forfeited.
i am not understand sir what should do for refund my money back.
please help.