They will not take not interested for an answer.
They are calling 3 times a day now. I have already told them that I am classing this as a nuisance call. If they call again I will get their address and invoice them for my wasted time. Then report them for harassment.
No idea who it was. I had a missed call and a voicemail from this number. The voicemail was just of background noise and some breathing, Then at the very end someone sneezes or says something and the message ends.
I've blocked the number.