I have tried to open a dispute with transunion online but it went nowhere. 
I had a collection account on my reports from " XXXX XXXX XXXX XXXX, XXXX ''. I paid them and on XXXX XXXX, 2015 they agreed to remove the accounts because there had been some issues with the reporting. I got this in writing as well in case there were any issues. XXXX and XXXX removed it quickly but 7 months later, it is still on transunion. I am attaching a copy of my letter from the collection agency.