Samsung India — fraud case

Address:

ranaghat loknath nagar, p.o-anulia, p.s-ranaghat, pin-741255, Nadia, West Bengal, 741255

Im brought samsung a50 mobile... The salesman told me this phone is waterproof. When my ph show the touch problem then i went to the samsung service center. They are told me this mobile is not waterproof. They are tell me change the display aprox 7500 rupees. But my complain is why the sales man tell me the phone is waterproof. The salesman told me this is waterproof phone then i brought this mobile. Then why im giving the company display changing money. Tell me why???