Food Panda — refund regarding food order

Address: Gurgaon, Haryana

I have order 10 times from foodpanda but got massage that due to high volume of order we cancelled your order, some time order could not be fulfilled. I contact foodpanda several time but they say we initiated refund but going to b a month i didn't get any refund. They stole more than 500 rs and now they are not giving me any support even their chat is not working on my phone.