Blue Star India — Inverter AC indoor unit

We have purchased, the Blue Star inverter ac of model: 5CNHW18DAFU on 1st March 2019 at sree lakshmi agencies (outdoor unit - Rs 24234.38/-, indoor unit - Rs 12484.38/-) Invoice no: 1596. Recently our AC is not cooling at all so raised a service request with Blue Star of ticket no: B[protected] on 29th June 2022, the service team has verified the unit and mentioned that Indoor unit cooling coil has been damaged/ leaking due to that AC is not cooling. They are saying that the coil was damaged due to climatic conditions, the coil present in indoor unit is completely covered there is a similar copper coil in outdoor unit, which is working fine. We are not seeing any scope of damage due to climatic conditions these seems to be built/quality issues. They are saying that the coil cannot be repaired, it need to be replaced it will cost around Rs 9000/- and to Refill the gas they are charging around Rs 3000/- the total charges will be around Rs 15000/- and these items are not covered in warranty, I have purchased the indoor unit at almost same price when these parts are most important they need to covered in warranty or at least repairable with minimal charges. As these are not repairable then there is no point in providing warranty for ten years. We requested the Blue Star team, to replace the entire Indoor unit instead of replacing just cooling coil but the unit is not available. Bluestar service team has charged Rs 500/- without providing any bill/service copy.