Spice Jet Airlines — cancellation charges

We have booked domestic flights of Bangalore to Kolkata wide PNR- H88Y5M(spice jet) on 29/08/2018 through IRCTC tourism website. Our travel date was [protected]. We canceled our we have booked domestic flights of Bangalore to Kolkata wide PNR- H88Y5M(spice jet) and Kolkata to Bangalore wide PNR-J5SYB (air India) on 29/08/2018 through IRCTC tourism website. Our travel date was [protected]. We canceled our tickets due to some reason within 15 hours. Firstly, we were not told about the cancellation fee by the airline or while cancelling not shown any indication of cancellation charges. Now we received a cancellation invoice stating it is almost 75% of ticket charges. Here by copy of the invoice and ticket details enclosed. Our ticket booking fare is of Rs 30484 and the travel date of the booking is more than 3 months after the booking date. This is the mere loot on the part of airlines despite it is cancelled within 15 hours. Hence requesting for consider my request and provide me the valuable refund from the airlines. tickets due to some reason within 15 hours. Firstly, we were not told about the cancellation fee by the airline or while cancelling not shown any indication of cancellation charges. Now we received a cancellation invoice stating it is almost 75% of ticket charges. Here by copy of the invoice and ticket details enclosed. Our ticket booking fare is of Rs 30484 and the travel date of the booking is more than 3 months after the booking date. This is the mere loot on the part of airlines despite it is cancelled within 15 hours. Hence requesting for consider my request and provide me the valuable refund from the airlines.