Mi Redmi - MI Redmi note 5 mobile getting switched off on its own within 10-15 sec of switch on

Dear sir,
My mi note * device not working from last * days it's with service centre from **hours.
Still issue of mother board not resolved or any further feeds from Mi.
***rs of memory card brought from the stores bcz of MI stores people said to recover data but after bught & given to them they said they can't do it.
My * days of man hours are lost were I could have earned more than what I have lost.

All official Data lost
No care towards customer
*days of non availability
No response from the MI end still about returning the device
****rs lost already in traveling back and fourth plus ***rs for the memory card from service centre for data recovery blunder.