White line across bottom of phone over keyboard

[Squirejim]

Hi, I recently purchased a Samsung s21 ultra online. No issues until recently a white line appears near the bottom of the screen, over the keyboard. When on charge the whole bottom of phone is filled in white/yellow. I followed the troubleshoot guide essentially a factory reset, now the whole keyboard and below is filled in yellow, making it impossible to text or read anything.  I bought it earlier this year, so hopefully samsung/o2 can fix it under warranty. Does anyone know how I do this? I was going to startbanconvo with o2 via my o2....then thought better of it. Any advice gratefully received in advance.. thank  you

[Bambino · Accepted solution]

@Squirejim Best to contact Samsung directly: Product Help & Support | Samsung UK

[Squirejim]

Thank you both, 1st time contacting samsung and it's been easy accessing an advisor and arranging doorstep repair. I did arrange a dpd pick up but the driver was so rude, I sent him away. Appreciate they on the clock for each dtop/collection but as u was getting my sim out to be told if it wasn't ready in a minute he would have to go....2 mind is his time allowed, so I suggested he left....its worked  out better as doorstep folk is coming Monday. Thanks all for your help!