device not unlocked cannot install image oneplus 2

Hi Guys,

My OnePlus 2 has this issue where if i restart the phone it gets stuck on the Boot Screen which shows OnePlus Logo powered by Android.
I can boot my phone to Fastboot and i can only boot into the phone by using command "fastboot continue"

When i try to use command "fastboot oem unlock" the phone reboots and gets stuck on the OP logo
Fastboot oem device-info shows
... INFO Device tampered: true
INFO Device unlocked: false
INFO Device is_verified: false
INFO Charger screen enabled: false
INFO Display panel:
INFO console_locked: 1
INFO exec_console_unconsole: 0
OKAY

and if i try to install twrp recovery by using the command "fastboot flash recovery recovery.img" i get the following message
sending 'recovery' (25956 KB)... OKAY
writing 'recovery'... FAILED (remote: device is locked. Cannot flash images)

Please help

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