Focusrite Scarlett 2i2 dead

Hi folks! Yesterday i had a problem with my scarlett 2i2, it seem to have a short circuit after i connected it to an audio console before i started playing live (which i could´t, by the way) after that it just doesn't work.
It's not the first time it happens to me, almost a year ago i used to have another 2i2 which died when i connected an XLR - Plug cable in the input, then i bought another which also died for the same reason.
Can you please tell me what i'm doing wrong so i can buy audio interface and make it last? Is it a common problem? would you recommend me to buy another brand?
Sorry for my english, btw.
 
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