USB Driver

Hello.

I have a samsung GT-S5233A and I recently installed the wrong firmware(S5233W) which caused many problems...

Now when I reboot the phone it even says "Samsung GT-S5233W" and I have a wi-fi widget even though I dont have wi-fi in my phone, and as I was trying to install the original firmware(which I couldn't find so far), my pc couldn't read my phone!
It says "USB Device Not Recognized", so I need the usb driver of my star S5233A please :crying: (Win 7)

Any help regarding the original firmware would be very appreciated!

Thanks