Unable to claim reward although I've completed the milestone

Product: Star Wars Battlefront II
Platform:Microsoft XBOX One
What is your issue related to? Challenges
Which part of it? Persistent
Summarize your bug The Challenge "A TREMENDOUS SERVICE" is not unlocking, no matter what I do. I have all challenges completed, but no final reward.
What is your gamertag/PSN ID/EA Account name? halomw2
How often does the bug occur? Every time (100%)
Can you tell us the date (MM/DD/YYYY) that you saw the bug? 12/10/17
What time did you see the bug? (HH:MM AM/PM) 11:00am
In what game mode did the bug occur? Galactic Assault
What is your time zone? PST - GMT - 8:00
Steps: How can we find the bug ourselves? Grind really hard and find out you don't get rewarded for the time and effort.
What happens when the bug occurs? Nothing Rewarded, cannot press Y on tile "A TREMENDOUS SERVICE".
What do you expect to see? "Choker Emote" and 500 Crystals
Please select your region North America
AMD or Nvidia Model Number N/A
‌I Contacted EA support THREE different times and no one could give me an answer. Instead they said they had no reports from any other players about this issue. Even when I checked the forums and saw other people were having similar issues, basically I was lied to directly. Extremely frustrating ! Please fix and award me with what I deserve this is such an annoying progression bug that should've been noticed before the launch. I can't stand grinding hard and getting absolutely nothing out of it. Thanks for reading.