How can i fix my Xperia C3

My phone had been stabbed by 5 tons lorry.. Now the phone super damaged.. How can i know the motherboard or system is fine ( I mean .. maybe the screen broken only) .. And how can i disassembly it .. since it had been stabbed by 5 tons lorry.. It become very tight to open aswell .. All answer I appreciate so much.. .. And another one is the led is light up when i connect to wall charger.. So I assume tht the phone is ok

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