Swiggy — refund of cash

See i had placed an order of 760 bucks and my upi transaction failed from swiggy’s side and money was deducted from my account and this happened on 11th of march and i had issued a query with the app where they agreed to refund in 2-4 days its been 20 days and i haven’t recieved my cashback. Their excuse to this is that some form failed of theirs.
All this happened on eleventh of march their was failure from their side and i am being fooled by swiggy because they are not in any ood of returning my money back as it has been 20 days from that now all they do is give me their # excuses about their form failure and i am hardly getting any response from their side even after complaining 5-6 times and its totally pathetic of then to do this with consumers