Who are they, they call all the time but I do not answer?

Stop!

Two years ago, I told them not to call me and they didn't call me for a while.But they just call me now Oct 19 2011, 19:30 and last week at evening as well.

Yep, it's Waterloo.  They will keep calling you, and calling you, and calling you, until you pick up and say that you do not want to donate.  I was a donor for 15 years, but when they called me in January for the new year campaign right after I wrote a cheque in December, I told them that I was no longer a donor.   They were ok for a year, but recently started calling me again.

Bunch of [***] need to get real jobs I stop harassing people

We got a call at 9:17pm and we were trying to put our 21 month old to sleep.  It's rude to call after 9pm if it's not a personal call to a family.  We need our rest.  Please be respectful.  Also, if these are students, they should be studying at this time, not calling us to make some money here and there.  Their own future (& marks) are at stake!