What recourse do I have when a creditor I had for 10 years, sends an erroneous report to the Credit Bureau that caused my score to drop 65 points?

I currently have a car loan with BMW Financial Services. This is my 4th car with BMW and my record will show that I have never had one late payment during this period. In August of 2017, due to hurricane Erma, like many residents of Florida I suffered a tremendous personal hardships. I contacted BMW and due to the fact that Florida was considered a natural disaster State, like many other residents I was entitled to receive some relief. Essentially this entitled me to get deferred payments without being being reported late to the Credit Bureau. My payment record will show that for ten years, I had never been late once, with my car payments. At the end of the deferred period, I resumed my normal payments and everything seemed normal with my loan. However, in January, I noticed that my Credit dropped drastically. I immediately investigated my report and discovered that due to the erroneous information that was sent by BMW, my score dropped 70 points.