Samsung India — not providing replacement

Address:

208021

I have purchased mobile phone of samsung galaxy a7 2018 in 30th september 2018 from flipkart. The phone is running very well but on 24 th july it have a pink dot on left side of display. I think it is defect and i go in service center in delhi on 25th and they see the phone and said today our server is not working come next day. I go on 26th july 2019 and provide mobile phone for removal of defects (They said that patch) but they deny and said it is not covered in warranty but the warranty card which i have, nothing mention about patch. I also talk to customer care they also said that our team is said it is not covered than not covered and not provide and replacement of display. Please resolve my issue.