Originally Posted by
shhnedo
After you've completed The Splintered Throne and Empowerment AND you've gathered substantial proof of it(screenshots of having the Edge and the 50 shards and turning in the quests), you make the ticket with that proof and you wait for an answer. After you have, apparently, received the "issue will be resolved in ~48h" response, YOU DO NOT WAIT FOR MAGIC TO HAPPEN! You go back in ICC and check the quest giver. If your "issue" is fixed, then you can literally complete Shadowmourne quest and you get SM + the achievement. That's how it worked for me WITHIN the specified 48 hours(initial ticket did take about 2-3 days).