Recovering an iphone 4S

I am really stuck, I have an iphone 4S which i tried to update to ios 6. It failed and went into recovery mode, it then failed and wouldn't restore so now i can't use the phone. The really helpful apple support team need a serial number which i can't access because i can't use my iphone, its not on the packaging and i don't have the receipt. Is there anything i can do to restore my iphone. I have updated itunes and my security software which was suggested on the support page but still it won't restore. It says error -1 when i try to restore. Is there anything else i can try??? Thanks,