ok i got a new deck but icant use it i have fill it with card but then drop my old deck banks then i fill my cards in but when i battle they are not there
Young Wizard, this is a common mistake made by many players who are just starting out - you must EQUIP your new deck. To equip your deck, simply select it in your backpack and press the 'hand' icon at the bottom of the screen. You can tell an item (hat, deck, etc) is equipped by looking at the small hand icon on the left.
Once you have equipped your deck, make sure you put all your cards and Treasure cards into it before you enter a duel!