Hello @EA_Atic, I have the same problem, I have Battlefield 3 premium, I just re-installed Battlefield 3 but now when I try to join servers that contain Back to Karkand content I get a popup that says I need the Back to Karkand expansion.
I have tried about 10 times to raise the issue with EA support but EA seems determined that I won't be allowed to raise a request. I tried the live chat support contact first (about 4 or 5 times) and got to the part where it says 'Please wait for an advisor in the popup chat window' only there is no popup chat window, none appears. I then tried the email contact to raise a request, which went through but then I get an email saying that EA wants me to have a call with them, but when I click on the link to go set up a call I just get a blank page. So I am unable to make contact with an EA advisor with any of the methods via the official support.
If you or anyone else could sort my account out for me it would be much appreciated.
This is my profile: http://battlelog.battlefield.com/bf3/user/SmartShots/