I suggest you to advance in the other quest meanwhile to reach at least lvl 6
I'm at level 7 currently and I still can't win the battle against Blackjack
Are you using your Badges? Using the Stat boost shop? Buying Equipment? Blackjack is Lvl8, you can keep waiting until you are stronger. The enemy Lvls are meassured considering all the tools the player has at their reach.
