Zomato Food Delivery — ordered cancelled always

I have ordered food if exact price, they will deliver immediately, but sometime they given code to use for discount after using this discount code the ordered food was not delivered i had a very worst experience in zomato and my rejected order ids are : order number: [protected] order number: [protected] order number: [protected] order number: [protected] and finally one i have not done but it shows delivered @ aluva railway station. How is it possible. I request people don't use zomato coupon codes they will not deliver