Food Panda — refund not received even after 25 days

I had ordered food on foodpanda app and both the ordered were cancelled by the restaurants. The amount paid through debit card was supposed to be refunded within 2 weeks but it has been 3 weeks, and still it is not initiated. I even emailed them the problem looking for a solutions (Along with sreenshots of cancelled order) but no help was provided. On top of that, they even banned my account. This is totally outrageous that such app play on customers while looting money from them... Such app should be banned from playstore