PlayStation Store purchases show on your credit or debit card statement as 'Sony Ent Network'. Any payments debited from your credit or debit card before mid-February 2012 appear as 'Sony Online Services'.
You can reach Account Management in a number of ways:
Tap [PlayStation Store] on the home screen and go to [Online ID] > [Account Settings].
Go to PlayStation Store. Sign in, go to your Online ID at the top of the page and click [Account Settings].
If, after checking your transactions, you still don't recognise the payments, find out more about unauthorised transactions and compromised accounts before contacting us.