How to correct a mistake on my credit report

[LJVB]

Car loan company erroneously reported a missed payment. They admit their mistake. Said to wait 6 weeks for it to be fixed with the credit reporting agencies. It hasn't shown up and it's been 8 weeks. How do I reach each credit reporting company like Transunion, Equifax, etc?

[DoninGA]

Dispute credit report - Equifax - https://www.equifax.com/personal/credit-report-services/credit-dispute/

Dispute credit report - Transunion - https://www.transunion.com/credit-disputes/dispute-your-credit

Dispute credit report - Experian - https://www.experian.com/blogs/ask-experian/credit-education/faqs/how-to-dispute-credit-report-infor...