Unable to claim reward although I've completed the milestone

Product: Star Wars Battlefront II
Platform:PC
What is your issue related to? Challenges
Which part of it? Persistent
Summarize your bug 2 of my milestones in particular are bugged. I'm providing full information at the bottom of the page.
What is your gamertag/PSN ID/EA Account name? Daemonshade
How often does the bug occur? Every time (100%)
Can you tell us the date (MM/DD/YYYY) that you saw the bug? 11/16/2017
What time did you see the bug? (HH:MM AM/PM) 02:00 AM
In what game mode did the bug occur? Galactic Assault
What is your time zone? GMT (UTC)
Steps: How can we find the bug ourselves? Try to complete the milestones, see if you run into the same issues.
What happens when the bug occurs? It locks progression for the milestones ultimately locking me out of the reward.
What do you expect to see? I expected it to progress as intended.
Please select your region Europe
AMD or Nvidia Model Number SLI 2x GTX 1080.

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The first goal I set myself on the game was to complete the 27 Multiplayer Milestones which unlocks the **** emote and 500 crystals, however towards the end of my journey I've noticed a couple of key issues that have prevented me from unlocking this.

Firstly, to complete "A Tremendous Service" you need to have completed 26 of the other milestones, but I'm currently sat on 24/26 even though technically I have 25/26, there is literally only one other milestone I need, but I'll get to that next. I did notice that during the milestone "The Aggressor" which insists you need to win a game of starfighter assault on attack on every map, I was only 3/5 progress but it completed automatically and gave me the 1,000 credits but this has not updated on the main milestone so I am permanently stuck with 1 less completion than I have.

Secondly, the milestone "Disrupted Enemies" absolutely does not work. I am still at 0/25. It states that you only need to assist in killing 25 enemies whilst they are under disruption status, but in my hours playing I should have completed this 100x over by now and yet I'm still 0/25. I have tried every type of grenade available, and even tried using Iden's droid and Chewbacca's grenade, and still nothing.

I contacted EA live chat to report this directly, and the only solution they offered me was exactly this, and it did not work for me:

" 2)Make sure you are running the latest version of Origin : https://www.origin.com/en-in/release-notes

3). Clean registry, clear cache and temp files : http://help.ea.com/en/article/how-to-use-ccleaner-to-fix-pc-issues/

4). Run Origin as admin :
http://help.ea.com/uk/article/how-do-i-run-a-program-or-a-game-as-an-administrator/

5). Clear cahe of Origin-

Ensure Origin is fully closed by clicking the Origin Menu and selecting Exit.

Delete the following folders:

All the files and folders in the Origin folder, except for LocalContent - Found in C:\ProgramData\Origin\LocalContent

All files and folders found in C:\Users\%USERNAME%\AppData\Roaming\Origin

All files and folders found in C:\Users\%USERNAME%\AppData\Local\Origin

Note: You can get into the appdata folder via Run -> %appdata%"

Again, I used every step of that guide, did exactly what they suggested should fix it, and still nothing. I'm stuck on the same bugged milestones, which is pretty frustrating as those 500 crystals could have gone a long way, and I just generally hate being bugged on progression as it's most of the fun I get out of games...