Food Panda — not delivering after payment, says refund will take 7-10 days

Website: www.foodpanda.in

I ordered food from FoodPanda. They accepted my payment and after that informed me that the order is cancelled. After contacting customer care, I came to know that they will refund the amount in 7-10 days.

Reply from customer care:
"You will receive a confirmatory email about the refund within 1 working day and the money will be credited to your respective account within 7-10 working days."
"We understand that you are eagerly waiting for the refund, however, due to banking procedures it generally takes 7-10 working days for the amount to get credited to your bank account."

What does foodpanda do with the money? Earn interest by keeping it in their account for 10 days? This has been going on for a long time. Something is suspicious here.