Samsung — Phone display

Address:

Himachal Pradesh , Mandi , ner chowk

My phones display is damaged and i installed a new display from Samsung service center New chowk . After 4-5 months o[censored]sage the phone display turned into green colour and sometimes it turns completely black . They donot gave me any information about the warranty of the product and when I told them my problem they are saying that the warranty Is of 3 months and they will not fix my issue !