Touch issue

[Kanha1210]

1 week before i brought new samsung a50 

Touch response is very bad i tought it was screen glass issue but there are some places in the phone like top right corner touch is not even working..

What can i do?

[pibi]

replace it fast

[Kanha1210]

how to replace tell me the process

[pibi]

you get one year warranty

[Kanha1210]

yes i got

[pibi]

how you bought this???

[Kanha1210]

from retailer shop