Lenovo — i am completing about my phone spoiled in warranty and corrupted company employees denied and demanding money

My phone spoiled two times in warranty. Lenovo care excuses it's liquid damage. But they could not show me liquid in phone. They denied to repair my phone and demand for 1180rs for return my phone with out repairing. I did not pay money and they kept my phone. I emailed to company the don't want to listen. My phone is in warranty and it was on/off problem. The company should be repair my phone or give me new phone because it's second time. The company employees corrupted they demand for money they said it is our salary. They demand for money to see my phone what happened. They gave document of 1180rs.