Someone keeps calling my phone and I don't know how to block it. It isn't just from one number either...
Not currently with the Lumia 920. This is a feature that the handset maker has to implement, and so far it's only been implemented on Chinese Lumia 920s.
This is kinda messed up. I just have to listen to my phone go off with annoying telemarketers and can't do anything about it....
What do you mean by handset maker?
No such feature, but some cellphone providers allow you to block calls from some numbers, maybe try calling and explaining your situation to your provider, see if they can do something about it...