Can’t purchase anything

I like the older version better. The bench is a bad idea as it serves no purpose. I try to buy some NBA cash and the 80 overall Kevin Durant for a dollar but it doe not work. I bought it and they sent me that it got purchased but it didn’t show up. I had to get a refund and now when I try to buy it again, it does not let me. It does nothing. This makes me furious as I’m trying to upgrade him but I need the Kd. I am not happy and it makes my not want to play this game. Please try to fix this issue!!!

Assassin 2000 about NBA LIVE Mobile Basketball, v2.1.5