Samsung Mobile - Samsung note 9 scree discoluration during normal usage and without any damage

Facing most common issue of samsung s eries and note series phone "screen discoluration" without any damage and customer servuce team saying to pay for display as product is out of warranty. Complaint id is **********
Now my question is:
*. no physical damage to phone and just sake of update given by samsung the phone display got damage. *. samsung have simple solution to change display for ** k but my question is why???? neither physical damage or nothing just for sake of update the whole phone look like daba. than what is use to purchase such high end device of samsung. it is better to purchase some other company phone upto **k. this time very bad experience with samsung. really bad. one thing more such good reputed company is keeping mouth shut on this issue. just simple reply visit to nearest service center . but it seems that consumer are harassed by company knowingly and just sake of money making tools from consumer. either samsumg do something or other wise all affected consumer should register the case against samsung in consumer court to teach a lesson to samsung.
Regards,
Himanshu