Mi — After replacing the display my phone stop working

Sir,
My redmi note 6pro display was damage but my phone was working good . I gave my phone to the mi service center Alleppey. To change my display .I gave to mi service center because I trust mi service center. Rather than giving to local shop.i payed 3390₹ for replacing my phone display. If I had given to any local Shop for that I will never have to pay these much amount. After repair they gave me my phone back . But the third day the phone stopped working. I again book to get tocken from mi site due to lockdown in our area it took little delay.when I gave back again telling the reason they checked the phone and told me that the board is short and I have to replace the board .my phone was working fine before after giving for display replacement this happened. I called mi customer they told me they could not do anything if the phone ha out of warranty. Now I lost my cash trusting Mi . My phone problem have after giving to mi service center. I request mi to resolve my problem or request to give back my money which I have spent for replacing my display.if I have given my phone to local repair my phone could be working now . I trust Mi .
Arun
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