Swiggy — they cancelled my order wasted my time took my money

I ordered on 9th april costing rs 313 and what i get is the delivery being out for delivery and after that they cancelled my order which was so shocking and then texted me that we are giving you refund of 156 rs which is half of refund... On complaining this they said try later for this issue as swiggy having some technical issue
And then i chatted today with them that i want my refund and they still having the same answer