Zomato — COD delivery has been removed from my account.

There is no cash on delivery option in my phone. It always show that cod is not available at this moment.But it is coming when I order with other phone. Why Zamoto have a option to add on more to order, why there is no option for edit your order after placing the order. Restaurant refused to edit order( Sagar Ratna) and customer support was very rude too. I had to cancel as no option for me. This is the reason they have taken my COD option. I am visiting India don’t have online option. Please resolve this. Thanks