At least leave a message why you are ringing

I?ve been getting calls from this number as well, it?s a fundraising agency called 2evolve ? they partner with different charities. If you email contacts @ 2evolve.com.au then someone can remove your details

They call and don't leave message...  When I call It says - thanks for calling "tool evolve" or "toola volve"??  Dunno but it's starting to bug me!!!