I just had the same thing happen, so I thought I would do a little this and a little that.  I have worked at a phone company in the past.  So, I know a little hints here and there...lol.  I was able to access their voicemail and listen to all the voicemails in their in box, this is definitely a no good company.  So many angry messages were left for them, I did a little extra as well.  I think I won't say just in case it comes back to me :-)

I agree! I am a nite owl so calling all nite would not be a problem for me.lol

Had a call from (604) 931-5109.  Just asked if we were moving said no.  Asked if we planned to.
We were last year but...Then the caller hung up.  Thats it.

Same thing happened to me today. The lady was very quick, to the point, and RUDE. She never asked if we're relocating.  Instead she assumed we were relocating and asked me "Can you tell me when your office will be relocating".  When I asked her if she's calling the right number (then told her my company name) she said "Yes - that's who I'm calling".  As soon as I told her we're not relocating or expanding she hung up on me without even so much as a thank you or bye.

Lets all call her at odd hours of the  day, and waste her time.

I had a call from 011-604-931-5109 asking also if we were planning to expand or move and said ,No and said ok,thank you and hanged up. I do not know what was that all about.