purble line on screen

I have a Samsung S-7 edge in less than two months of use, vertical purple line on the screen appeared. Screen replaced with a new one, and after less than a month the same line back in the same place. I tried to repair by clicking on the cable behind the screen where the light pressure when the line disappears. But I messed up the work of the screen entirely. The problem I am afraid that the screen was replaced and spent the money and then break down again. Any useful answer be gratefulbold text