Swiggy cheats customers frequently. Swiggy customer care representatives will never refund back the money even if its thee mistake. They will suggest you to write to support@swiggy. Response from support will be " Sorry this, this will never happen again. We are assuring to take strict action against the restaurant so that u don’t face it again".
Order the same item from the same restaurant, it will happen again.
Summary: Swiggy is doing an organized cheating business. Price differences are also very high compared to the original restaurant price.