Well, I'm afraid that we can't really do anything about it, we don't have any powers when it comes to anything tied to accounts (including stats). You can try to repair BF4 in Origin, but I doubt if it is going to help in any way.
Actually, one question: Have you used an old cloud save when you joined the game (older than your non-cloud save)? I know of cases when selecting the older save (so cloud one) sets your progress bck to the point from last cloud save, effectively nullifying anything you got afterwards.
However, a question: what weapons were affected by this?
Which weapons are missing, are they progression weapons or assignment weapons? Did you unlock them and then a server crashed during the round they unlocked?
