@dR0W Ok. It seems like Pulseaudio is unable to enable "voice call mode" on your BT headset for some reason. To help investigate this, please follow this:
Disconnect the headset if connected.
Run echo 'exec pulseaudio --start -vv --log-target=syslog' >~/.config/upstart/pulseaudio.override to enable additional logging on Pulseaudio.
Run initctl stop pulseaudio then initctl start pulseaudio. Note that restarting it won't take the settings above into effect.
Now, connect your headset, then have a call.
Send me the file /var/log/syslog. I'm not sure if it contains sensitive information or not, so you can PM me if you want.
After testing, remove the config file by rm ~/.config/upstart/pulseaudio.override
Also, if possible, could you please retry this with the old version of Pulseaudio?