How do I block a number from being able to call/text me?? (Rogers)?

for one class at my school we had to fill out a sheet for some summer job stuff (even if we weren't interested) and I just gotta call from them and I set up an interview for tomorrow by mistake LOL. They were nice people and they didn't really give me an option, they just asked to meet them at some place

But I don't wanna go and I know they'll keep calling if I don't show up and I don't wanna have "that" conversation lol

How do I just block the number so I don't have to deal with it??

And so I don't seem like a dick, there's gunna be other people at the interview too according to the guy I talked too so it's not like ima be leaving him alone
Galaxy Nexus