Indigo Airline - Partial Cancellation of Air ticket

I have booked Indigo Airlines on **-**-**** form Mangalore to Varanasi (Air ticket reserved on ** Nov ****) to attend pravasi-bharatiya-divas event at Varanasi.
I have got message on **-**-**** evening at **:** hours by mail (Flight at **: ** Morning of **-*-****) stating that your flight sector form Mangalore to Bangalore cancelled, where as Bangalore to Varanasi still active. This forced me to cancel both flights (which are on single pnr) and book new flight by Spice Jet on **-**-****.
Due to this cancellation:
*. I lost one day pravasi bharatiya divas event at Varanasi,
*. One day hotel booking at Varanasi,
*. Indigo flight cancellation for both sectors
*. New flight booking by Spice Jet at last moment which occur additional cost.

Please consider this issue to give me right justice.
Regards,

Ramesh Marakala.