Nimble lies

Absolutely terrible!! I settled my Edgars account before Nimble took over but still Nimble said I owe them money, so I went ahead and paid the set amount again, after the next statement still stating that I owe them money I called them and finally got ahold of them, managed to get a letter out of them stating my account is paid in full. But still to this day they show up on my credit stating that I’m 4 months behind on my payments to them, and of course no way to get a hold of them because they don’t answer the phone or reply to ones emails