You can just progress next week, you get the 14 crowns you can get every day and if you got the first premium and play regularly you will get level 100 anyways.
Just getting those, the quests (which do not even have a timer) and the weekly crowns has already gotten me to level 12, although I agree that there should not be a limit to the weekly crowns (which is admittedly the same as the initial 4 full crowns per day).
How could you make it to lvl 12? I don't get that. I bough premium, played many matches every day, always spent those extra 14 crowns, etc. and I'm still at lvl 7. Today I wanted to play, but I'm receiving weekly crowns pieces limit.
So why you are at lvl.12 and I'm at lvl 7. when we both reached the maximum crowns pieces?
Journey quests don't work for me even after the latest update. They are stuck, not progressing... maybe that's the reason, but these quests still give you crowns. Maybe they are not counting into the max amount (cap)?
Btw. I just stopped playing, until it's reset, so I can progress the journey again. I'm not receiving any additional RPs, beside the daily quests.... so why should I play? Very well, CDPR! You just demotivated me to stop playing Gwent for the first time in my life (I have 2k hours since closed beta, mostly in pro ladder, not a rookie with 1 week playing). I don't need to climb the ladder. And I have to say, it's very very difficult to make ME to actually not play the game.