I'm getting harrassed by this number - calls about five times a day and doesn't leave a message. when i call back the recorded messages says "due to temporary service difficulties we are unable to connect your call at this time".

Calls every day at various times. I answered the first time but there was no response. I have never answered since but they persist in calling.

Called and left voicemail of just breathing. Very weird, blocked.

I called back number (02) 8003 3978 rang once then gets disconnected automatically.