screen flickering for S20 plus

[touch screen problem]

Hello , 

I've been working hard for many years to handle the cost of S20 plus and I've spent all my money to afford it .and I'm faced with new issue "screen flickering" .
and don't know the reason. at first it was just flickering after reset the whole screen got green .
and I can't afford to change its display . 
I hope Samsung follow this issue with just simple update.
Or give us a new phone.
Thanks .

[Pugs1957]

It may not need a new screen however the only way for an accurate diagnosis is for it to be examined by a technician. Is your phone under warranty?