Domino's Pizza — rude behaviour by the employee of domino's

My fiance made an order worth Rs.400 from domino's (kondhwa, Pune) on 14th june 2015 @9.12 pm but did not receive the delivery in 30 min. time..He received it around 15min later.So on having a talk with the delivery boy he was told to return the order so that he will be given Rs 300 off for this inconvenience.The moment he called back to the kondhwa domino's to say this an employee there named Nikhil spoke to him in a very rude tone n tried to show him down due to which my fiance had to cancel the order. Nikhil was absolutely rude and this was really a bad behaviour on ur part.