Spice Jet Airlines — marketing gimmick & over charging

Address:	Gurgaon, Haryana, 122011
Website:	Make my trip

I have booked the ticket from make my trip for spice jet airline yesterday (19th july 2017) from delhi to trivendraum for my daughter. While booking on the screen 2 rates are visible on the screen for the same flight (Sg-946) & unknowingly i clicked the first option & paid the total amount of 4606. I took the print out & found that the option i selected is without baggage one. I called the support team (Mobile no [protected]) at 16.15 hrs, similarly i called make my trip at 16.22 hrs & after listening the grievance both told they cant do any thing as the baggage tag is available & you chose the wrong one & you have to pay rs 400 if you want to take 15kg of weight along. This is happened immediately after within one hour of my booking

Now my questions are

1) why the non baggage tag is available as first option
2) if there is wrong selection by customer why should they pay rs 400 as additional if the observed immediately after booking. They should pay only the difference of amount
3) if the cost of 15 kg bag is rs 400 then why the discount is just 10 rs (Attaching the screen shot to prove my point)
Airline are making fool & charging big amount