Display module not working

Hi,

My Mrs' iPhone X has the issue with the display module - it doesn't always work on the LHS of the screen with the touch and it sometimes it does things of it own like your touching it a different place.

Apply want £260 to fix this so it's not worth doing when I can buy a refurbed one for £200 so I am wondering about buying the part and having a go myself anyway? Can anyone point me to the part and guide of how to do it? Is it just the whole screen I should buy?

Thanks