Jet Airways — Lack of any refund

I booked internal flights Mumbai to Thiruvananthapura return on line about 10 weeks prior to travel on Jet Airways. Premiere Class seats costing over £600 yes £600 . I requested cancellation over 8 weeks prior to flight and was told no refund available. Jet airways have therefore pocketed this money and will no doubt easily sell the seats again. This type of service is clearly not acceptable. Facebook and twitter will have this posted in near future