BB Torch :: Can't Decline Or Delete Messenger Contact Request

Not being familiar with BBM, I recently added it to my phone with no security options turned on. Friday I received a ton of requests (from unknown people) to add mine to their contact lists, which I declined. They each were removed from my message list when I declined them. However, one of the messages will not go away. I have clicked "decline" and have attempted to delete the message, neither of which has had any effect.

I have since blocked incoming PIN messages in my firewall with exceptions of "Contacts" and "Specific Addresses".