Sony India — Unable to repair my phone

Address:	Jaipur, Rajasthan, 302025
Website:	www.sonymobile.com/in

I purchased an xperia z5 premium dual with all my savings. Last week due to rain the phone stopped working. It was in my pocket when it was raining. I remember all the flaps were closed as they always are. The screen started flickering and then the screen was non responsive. The device seemed like it got crash or something. I went to nearest xperia store where the attendant told me that the device is water damaged and the only option i have is to pay 80% of the initial cost of new phone to get it replaced.
{moreover, i don't have an insurance on the device because the only insurance retailer is syska gadget secure which i found in my previous phones to be a fraud investment.}
This is horrible service. I don't want my phone to be replaced by some other phone. I want my phone repaired!!! I want my data back!!! I don't want refund for a device which your company claimed to be water resistant or waterproof ipx8 or anything. I am a sony lover, i respect your phones. It is unfair to pay for my device to be restored or replaced. I want my important college research data which is in internal memory of my phone.
I am very disappointed with the response of customer care guy from service centre.
If you don't take serious action on this, i believe the only option left for me is to file a complaint on your company under indian penal code 1860, section 415 & section 209/ or simply under false claim act.

My device model number is e6883 (Gold)