How do I fix vertical green, white, and pink lines on a broken iPhone screen after iOS 18 update?

My phone is showing 3 colours of vertical lines green,white and a pink I think..help me out of this please

It has showed once after the ios 18 update...later i formatted the phone repeatedly for transferring data from my android then the line has disappeared..the phones screen hadbeen broken in 2021..but there was no issues till update..help me pleasee

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