Hey MV4Si,
Sorry for the concern with any packs that seem to have gone missing here. Just to clarify, you said you opened the packs, received an error, joined a game, and got 50 packs after finishing the game?
I'm a bit uncertain here as you said both that you opened the packs and that you got the packs after opening them, but didn't get anything. If you received an error when initially trying to open the packs just before joining a game, it's possible the packs were just returned if they couldn't be opened at the time.
It may be worth signing out of the game and relaunching it, then repairing your game installation if needed. From what I can see here, you still have a number of packs on the account and have not opened any recently without receiving something from them, though there weren't anywhere near 50 packs opened today. If you relaunch your game and appear to be missing something, it'd be best to contact support directly so they can take a look at the contents of the pack(s) that were opened.