Spice Jet Airlines — cancellation of spicemax by cabin crew on-board

Sir /madam I Dr Ashmita kiran and my son today travelled by ur flight sg3471 from Kolkata to Vizag. We booked the spicemax seats at the check in but after boarding in the flight we came to know that people below age of 15 were not allowed to take the spicemax seats. And as my son is 13 yes old only, he was not allowed to take that seat. As a result we have cancelled our spicemax bookings and demand a refund as one your fellow staffs and your hostess told that it can be done.To help you in any order for cancellation here we send you a photo of the boarding passes.