Impossible to delete text conversation (32665)

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http://androidforums.com – I recently tried to add text notifications to my Facebook account for privacy reasons, and now on my GS3 I'm unable to delete the text thread from Facebook. (A text conversation to 32665) Whenever I delete it, it just shows back up right away at the bottom. I've marked the number as spam, reset my phone and killed the messaging app and nothing works. Any help? (General)