Zomato — order not delivered and made me wait for hours in chat support

I have made an order from biryani box restaurant near my area. After 40 mins i tried reaching out to the delivery boy but his phone was switched off. So complained same with zomato through chat support. They too tried to reach him and could not as his phone was switched off. Later after 30 mins zomato offered me for arrange of another meal. I said yes make it quick as it is already late. After that there was no reply from the chat support no meal nothing.