credit one credit charges after account closed Las Vegas Nevada

owed this company about 1000.00 ...borrowed money to pay all; balance off called them to notify and was advised that there was still a balance due..i asked why, was told late postings on my account...so i paid, still advising them to be sure my account was closed...all the while i received many e mails from them also more charges were now present...i called again and was given the run around , only advising me i now had 1 76.00 balance...as of today after 3 calls to stop this i was advised that now the balance was now 139.00 of which i have no idea why since account was closed 3 months ago and credit cards destroyed then...