I also purchased my copy drom Gamestop and it was missing the PS+ trial voucher and the CoO & GoS voucher doesn't work either. I contacted Sony in regards to both issues, sent the emails to them for review and will now wait for a response. Hopefully will have an answer in a couple of days.
Yay for resolved issues! Now I don't have to direct you here:
But if someone else sees this they should check it out