National Insurance Company — withdrawal of boi national swasthya bima

I have a mediclaim policy under boi national swasthya bima, policy number[protected]. I have been continuing this policy since 2013 with regular premium. Suddenly i received the letter intimating that the company is withdrawing the product because the cost of health care has seen a sharp increase and this product is unsustainable with existing price and terms and conditions. After giving all the premium without a single claim for so many years my policy became invalid according to the wish of company. Please do the needful so that i get justice to continue my policy and avail the facility under that.