Xiaomi India — Same problem in phone after giving it 3 times in servicing

I have recently purchased Redmi 8A dual phone from Amazon India. Within 15 days of purchase, my phone started giving me a problem. The touch is giving a problem and it never stops. Automatically it starts blinking. I have been to my nearest service centre but after giving it 3 times, there is still the same problem. They are saying nothing can't be done. I would request Xiaomi India to please refund me and take the phone with them.

Attaching below is the phone issue