I have been trying to purchase the recently released football manager 2019 mobile from play store but whenever I input my Gt master card details on play store, the transaction is being declined. It says.. "transaction declined invalid payment method" I have more than enough money in my account to pay for the game yet it keeps giving me this error message. I don't know what to do about this and I have reported the issue to Gtb and they say it's probably a network issue but it's definitely not. I use a 4g lte android and I was downloading files at 2mb/s rate at the time I was trying to purchase the game. Please anyone who's successfully purchased the game or know how to do so, please help me out.