I can’t get the game to sell me new playrr slots, and there is no google game control icon to select. Also could be because as soon as the game starts it immediately bypasses detecting google play, and it goes directly to my browser instead of remaining in the game. Something about new quests, but it’s a blank page.
Sounds like you need to restore your purchase for the slot.
Start up Dungeon Quest
Press the Options Button on the main menu
press the “Social/IAP” button
Press the “Restore purchase” button.
Let me know if that helps, if not we can talk directly and see what we can figure out.