Jet Airways — no refund on cancellation of flight

I had booked tickets to Bangalore from Mumbai for 29th March, 2019 & I received an e-mailed 2 days before that my flight is cancelled & nothing mentioned regarding the refund of my money spent. Kindly look into the matter & give me the refund for the same as it was from your part that the flights are cancelled. Their customer care puts you on hold for forever & then disconnects the call! This is unethical & unprofessional on your part! Plz give our refund back!