Okay so that sort of worked.. They're blocked on my online browser, but still listed as a contact in my People app that I can't delete. Not sure how that happened, but as long as they can't message...

So I tried that- deleted and even blocked them. Two seconds later they messaged me again! They're all of the sudden not blocked anymore.

Okay, this one is really killing me because I can't find anything online and Microsoft support itself didn't know how to fix it. Someone invited me to add them to my contacts the day I got my...