Each collection has a different reward. It could be that you expected to receive Coins, but the collection reward was Bingo Cards. Make sure to check the reward to see what you get for each Collection. The rewards are depicted as a pile of Coins or stack of Bingo Cards. Coins are added to your Coin balance, while Bingo Cards are added to your Bingo Card inventory.

If you are confident that you did not get the reward what you were supposed to receive, please contact the Support Team.