If i were you i would try flashing the stock firmware [link|https://www.getdroidtips.com/unbrick-xiaomi-device/|Here is a link for www.getdroidtips.com|new_window=true][br]
Then when you have confirmed the phone works check the file you flashed and your phone for region compatibility[br]
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and please edit the question addin:
The firmware you used
The region of the phone (or just where you bought it)
The tool(s) used for flashing[br]
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Good Luck!