Xiaomi India — mi a1 handset defect

Address:

Thane, Maharashtra, 421204

Hi sir i am sachin khetia, i am a regular user of mi phones but from more than 2 months i am facing issues with my mi a1 handset. The handset restarts automatically as we use the mobile phone, the more we use the more it restarts, at first month it was restarting 3-4 times a week but now it restarts 7-8 times a day and so on depending on how much i use it. The way it restarts seems to be a manufacturing defect. I have tried factory reset/wipeout data, but it starts restarting within half an hour, i recently tried to repair it from a unique telecom xiaomi service center they changed the usb charging port giving reason of dummy charging effect but still it keeps on restarting, and now i think it is a manufacturing defect of the handset that it restarts infinity times, and it is up to date but has the problem. Please help me to this problem, i want a handset replacement, my handset's physical condition is excellent and the issue is started from and after 10-20 days of purchase. It has been 86 days i have bought this phone from e-commerce site flipkart.

Thank you and appreciate for your help.