Food Panda — Never delivery order

Address: Hyderabad, Andhra Pradesh

Hi, I have ordered from foodpanda app three times to a particular vendor. Three times the vendor rejected the order since I was using the foodpanda coupons. Foodpanda never called to inform the order was cancelled, only after i check them they come back to me. I want the proper response from the foodpanda team and refund me double the amount i paid online.