Xiaomi India — Poco X3 Camera and Speakers aren't working after MIUI 13 Update

My phone is Poco X3 and its 2 years old (out of warranty) since September after i received MIUI 13 update, my front camera, ultrawide camera stopped working and within few days my both the speakers started working and I am in a stage where the primary function of phone cannot be used which is calling someone, i need to carry my Bluetooth earphones everywhere for calling purpose.

I did reach out to service centre and they say it would cost me 9k for motherboard replacement for a problem that has occurred from the company. Kindly resolve the issue at the earliest as i am in no state to take a new phone