Hello Irena,
If you want customer to send the money to your bank account, then you should use Offline Payment, not Offline Credit Card Processing. To insert your bank data, you should go to EShop->System->Messages, then edit Customer/Guest Offline Payment message to add your bank account there. This will be sent to customer after they place order so they will send the money to your bank account.
Hope that this will help.
Sincerely, Giang
