[2020] I'm not unlocking any guns from class ranks, who should I talk to?

You sure about that? https://www.reddit.com/r/BattlefieldV/comments/fgw88t/please_everyone_did_you_receive_the_missing/fk8a9qf/

https://www.reddit.com/r/BattlefieldV/comments/fg05qw/this_week_in_battlefield_v_march_9_2020/fk89o0x/

As noted in This Week in Battlefield as well as a couple posts from PartWelsh, a server-side fix rolled out this morning.

If you are missing Class Rank unlocks, complete a round (and rank up the Class) and all your missing Class Unlocks should drop. You should be able to do this with a Soldier Rank up.

If you need more help, contact EA Help at http://help.ea.com and they can check your account for you.