I'm aware of the unblock and have had good experience in recent times with it - Originally it was a little hit and miss where we'd be told it was done but it wouldn't work and we'd have to request it again.
Just an FYI, we did have a defect with this feature that impacted some circuits which resulted in the on/off toggle not working every time. That has been long fixed now, and it should work very well now. Let me know if this is not your experience from now on.
I hear you - in the customers own words "I don't like to cause a fuss" - I picked up the ball to run with it and knew me phoning on her behalf without being with her would be problematic so went to the forum as it works.