This number has been calling me repeatedly every day for the past week. No one says anything when I answer. It's just silence for a few seconds then they hang up. I called back to get my number blocked, and it didn't work. I have no idea what the company is or why they're calling me.

When I call back, it tells me to press 9 to get trivia questions sent to my cell phone that I can redeem points with for all sorts of enticing things.

I've been spamming them for the past few minutes. I can't get a human or the option to block my number.

I'm getting really annoyed. Any ideas on what this is?