Called mid-afternoon on a Sat. No message

I think its the telecommunications company hired by sick kids to do their fundraising.  I find that i'll get nothing for a while then for about a week a month they call non-stop.  They're really nice if you answer.... but sometimes you just dont want to have a 5 minute conversation explaining that when you have the money you'll give them a shout.

Have been getting calls from this number quite often and when you answer - there is no response....

I got many calls from them, I wasn't at home, so I call them back. They have an automatic operator that mentions "co-marketing solutions" or something, and claims that she's not there!.It is annoying!

They call me 2 or 3 times a day for the past week. Very annoying. I refuse to answer.