I bought all the characters and monsters but when i joined a game torvald. slim. crow. lennox and behemoth where locked.
Just to clarify, did you buy all these characters through Earned Currency?
Im on console so i bought them with real money
Submit a message to 2K Support, they should be able to help you out: http://support.2k.com/hc/en-us
Ah, so this is happening in your Legacy/Console version of the game?
Sometimes I found on my XB characters would disappear for some time and randomly come be available again after restarting a few times and/or playing matches.
Play some more matches and see if they pop up again before submitting a 2K ticket
It looks like i have the same problem because i played a game and after the game i got the characters again.