Nokia India — display flickering and poor service centre reply

Address:

vadodara, Vadodara, Gujarat, 390018

Hello,
so, I ordered my nokia 6.1 plus on 6 sep 2018 And it works properly till now, but almost a week ago i found that display was flickering sometimes (i also have video recording of issue). So, i went to nokia help-centre on 05-sept-2019 but as i mentioned it only occurs sometime so i show them video recording of the issue but as i my warranty expiration date is near, they just update the software and return my phone by saying your issue fixed. but only one day after i can clearly see that issue is sill there and now i can not see whole display on my phone. And i also reached to Service centre but now they are saying that your device's Warranty date is gone so you have to pay 9000 for display (price of brand new Nokia 6.1 plus is 10000). So please guide me And take Action on this manner respectively.
Details -------
JobSheet No:[protected]/190905/004
care centre code : 974_504867
Contact Number : [protected].
reference number on customer care support :- [protected]