oh dear, that was stupid. why did ya carry on upgrading the bios after getting an error message. surely this would have given you a clue that there maybe a problem with the update. as far as i know there is no way of rescueing the card (maybe someone else does). as you have just bought the card you could take it back to where ya got it from and lie (dont mention the bios upgrade) and say it just packed up and see if they will replace it.
hope you have learned a lesson from this. always read the instructions properly and if ya get an error STOP.
sorry if i have seemed rude, dont mean to be.