Will it ever end?

Today I went back to my parents' house to get some stuff we left there. We received a few things in the mail over the last few days, including ANOTHER BILL for Emergency Room services after Mark's accident 10 1/2 months ago! >:-| I cannot even begin to express how annoyed I am with this. The hospital has been so incompetent with this whole thing. We are receiving the bill because the insurance claim was rejected since they had "incorrect insurance information." They probably tried to bill our car insurance again despite Mark having called half a dozen times now to make sure they have the correct insurance information and send it to Blue Cross/Blue Shield with the correct group number on it. They have previously sent it to the temporary insurance we had in Illinois for the month of June. I'm surprised they haven't tried to bill it under the temporary insurance policy we have since moving back to Ohio. Maybe they did. I just do not understand what is hard about sending the bill to the correct place. So angry and annoyed about this. /end rant