#HELP. Sorry to bother but im in a mess. Plz help

I searched high and low for solution of my problem but i couldnt find the right solution to my problem that's why I'm starting this thread.

Phone- Xperia Sp C5302
Stock Kernel v205
Rooted
Philz Touch recovery installed
Nandroid backup made using TWRP
Tried to unlock bootloader- Problem starts from here........

Initially phone rebooted normally but couldn't detect sim and signal. :eek:
Then phone started rebooting after few minutes . Stay on for a while then reboot again till battery died.
Now battery not charging, phone showing no life, no led, no vol up+power, vol- power , vol up+vol down+power work :(
Tried everything I know plz help and plz explain slowly and calmly.

THANKS IN ADVANCE.:)