Raksha Tpa Pvt Ltd — delay in processing

Recently i had undergone heart surgery in bangalore. The total cost of the surgery was rs 2.50 lakhs at panecea hospital. My main insurer star health cleared rs 2 lakhs immediately. But my corporate insurer raksha tpa is dilly dallying to clear the balance amount of rs 50, 000 for the last 3 month. Even i submitted noc from star health. Till date, after a gap of 3 months i have not received any feedback nor my claim amount. I have submitted all the documents, original/zerox copies i got from hospital and star health repeatedly as and when they asked for it.