bootloader refuses to unlock topic

I've tried to unlock the boot loader of my HTC one m7 to no avail.
I tried unlocking it via htcdev but after wiping my phone, my boot loader still remained locked.
is there any alternative way of unlocking the boot loader without htcdev?
I saw one that involved typing some commands in fastboot but I'm afraid that might wreck the phone.
PS, I'm a newbie so please make any suggestions as plain as possible