AvisBudget accuses me of something I did not do!

Rental agreement number ***.<br> <br> In 2013 I had a claim that I submitted to my then insurer, so they organised me a courtesy vehicle through Avis whilst they were processing the claim & of course they submitted their details when they made the booking hence it was going to be the ones that pays for the rental. Then the vehicle was due back in but I kept it for a couple more days but then Avis billed me for those days & I eventually settled the account (meaning that I don't owe AvisBudget anything). They then decided to \flag"my name as a \""risk\"""