Contract killer zombies

My name is Rick Lisak. My Game Center ID is Monkeypuncher. I switched iPads and lost my progress and all of the money I spent on guns. And I spent A LOT! Pleas help. I dropped a lot of money and need my guns I payed for. I will give you any infor you need to retrieve this info. Please, please help!! I love this game and want to keep playing it. P.s. I saved previous game on FB and it shows progress in Game Center. But my new iPad makes me start at the beginning with NO weapons I bought. HELP,!!!!