Xiaomi India — Poco X3 Pro motherboard dead, speedy repair or extension of warranty

I submitted my phone Poco X3 Pro in Xiaomi service center on 16/01/2023 as the motherboard of my phone was dead. They told me that I would receive my phone within one and half months. They returned my phone on 22/02/2023, but I have to submit it again as after changing the motherboard the camera of my phone was not working, more specifically the camera was not opening. But now near about 1 month has elapsed already and they are saying to allow them another 2-3 months for such repairing work. But without my phone I have to face a lot of difficulties. But no positive answer is received from their side. And also my warranty of my phone is ending on 02/04/2023. Hence if they take 2-3 months time to repair my phone my warranty period would be elapsed. Hence I am seeking a speedy repairing or extension of my warranty period.