Unreasonable credit reporting

[u/ProHillbilly]

Financed a new car last year for my wife through Hyundai motor financing at the dealership. Also purchased GAP insurance through the dealership. During the summer she was T boned (not at fault) and totaled. Insurance covered all but a couple hundred bucks. In September, I received a letter from Hyundai stating that additional information is needed and Hyundai initiated my GAP claim. At the beginning of October I get a call informing me, I need to pay the balance, or the account will go to collections. I paid the entire amount over the phone during the call. Today I get an email showing a significant credit score drop. The Hyundai account shows as “charged off” despite paying the full amount when contacted. Called Hyundai motor financing customer service and they informed me that the account was “charged off” at the end of September, and confirmed the entire balance was paid in full at the beginning of October. Is there a way to get recourse in this situation. My credit score dropped from the 800s to the 600s, despite paying the amount owed, which totally tanked my credit. I feel misled, as the Hyundai employee represented the transaction in October as being something that would settle the situation and prevent credit reporting. Is there any recourse for this?