Servify — insurance claim fake

My mobile(OnePlus 5) got liquid damage and internal parts are drowned. When I claimed Servify insurance they gave an estimation of 37000 for my OnePlus 5. Now they are saying that only depreciation amount 18500 will be covered and remaining 18000 I have to pay. While choosing plan they say that only 750 have to be paid for admin fee. But after claiming insurance you say only depreciation amount shall be paid for damages and repair. This is ridiculous and cheating people by this servify plan. Even this "depreciation" sentence is not even mentioned in terms and conditions of the plan. I need justice immediately.