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

Same again, thanks.

they keep on calling me everyday around 6-7pm. does anyone knows how to block this phone no?

Stop!

If you no longer want to receive phone calls from UW, pick up the next time and call and say "I do not want to receive calls from UW anymore, take me off your phone list." That's the only way to get them to stop. If someone keeps calling you from UW and you have no affiliation, pick up the phone and tell them that you have never attended or donated to UW so that so they can erase your number from their system.Please keep in mind that these are students calling you. I worked there and can tell you all that the students do not enjoy disturbing people, they are just trying to pay the bills while they're in school.

This is precisely why anything 519-888-* we let it go to the machine.  If it's someone calling from UW with actual business (as has happened with my wife in the past), they will leave a message.

They call u and not leave a message. They want to know if u home or not so they can rob you!