Black spot at the bottom left corner of the screen, Help!

Couple of hours ago I found out there is a tiny black spot at the bottom left corner of my screen. It doesn't look like dead pixels (or maybe it is, I dont know) but when the screen is white I almost don't see it. But when the backlight is grey, purple or darker colors I can clearly see it And it's making me really angry because I paid so much money on it. Please share your thoughts. Anything helps.

iPhone 6, 64GB, space grey

P.s: I live in Tehran, Iran and there's no apple store here.