Since the update i’ve been unable to upgrade a single card whether i have enough duplicates to do it for free or i spend in game currency to do so. I hold down the X button as usual on the card i want to upgrade, the animation for it happens but then it never levels up & still says it’s ready to upgrade.
What’s even worse then this is after restarting the game to see if that would help a new card i unlocked by getting Lizzie to level 5 has now unequipped itself & is now greyed out no longer selectable as if i never unlocked it in the first place.
They occasionally look at this forum, though if you want to speak to them they advise sending them a tweet… But if you don’t use twitter then you can’t. Or you could submit a support ticket to them, but people are still waiting on replies to tickets submitted 3 months ago… It would be easier getting blood out of a stone!