Hack would be making a REAL external device and infiltrate your wireless network -> your PC and start the PC without you knowing, get your passwords and taking your account by force.
Account info is one thing but you gave your effing credit card info? I'm sorry that's just downright unbelievable...might as well give them your wallet with your ID and any passports you have while your at it lol
On the subject I have actually experienced having accounts "hacked" or stolen or whatever before...lost about 200 bucks and steam wouldn't give me the account back. Some random dude whose email I actually had at one point and emailed him trying to figure out who he was but it wasn't anyone I knew...so yeh...