If you’re sure the credit report is inacurrate, you should contact the credit company to inform them of your resurrection and perhaps post your thankfulness for being alive on the November Gratitude thread.
Sorry, I can’t be more helpful. I know from experience how hard it can be to get something that appears to be simple fixed when dealing with bureaucracy. Years ago, I was listed as “male” on my Massachusetts drivers license. The options for proving that untrue were unappealing. It was corrected eventually, but you’d think that my simply showing up at the Massachusetts RMV to point out the problem would be enough. Unfortunately, it wasn’t. Better luck to you.