Swiggy - Missed my items in my order gave a coupon which is in return my money

Order food of quantity * in swiggy pop out, received only *. I did a chat they said we apologise and give you a coupon of *** once accepted it tells can't apply for pop out.
*) They wasted my time.
*) Didn't return my original amount and in returns tells its the coupon itself.
*) No re-initiate of order.