Pathetic service and products

I bought a brand new hisense smart TV on Black Friday, one month later the picture disappeared and I took it to the technical department in woodmead, the technical department as well as their so called supervisor said it was liquid damage on the inside of the TV but neither could prove it because there was a drop yes 1 single brown drop in the inside of the TV with no other damage, after hours of debating and nothing could be done I was to be the loser of R8 000, can someone tell me that without opening the TV that it could be water damage now they opened it and the TV is worse than before, they pathetic and I will not be buying their products ever again,