Yaantra — Refusing to claim warranty

I made my device realme 2 pro screen replaced via yaantra . They replaced the screen and additionally provided 3 months of warranty. The mobile display didn't seem to be of perfect finishing so I returned and asked to properly fix the issue but thrice they returned the same so I paid 300 less. Lately i came to know that they have put oppo f9 pro display. Later device stopped working in 3 months so I asked for warranty claim but the pickup agent refused to take giving reasons that the display is damaged from inside the fact is there is no sign of scratch or dent on the screen . ### excuse .