Today when I went to see a real state agency I found out that in my credit report is a credit card for {$6700.00} which belong to my ex-husband. When he was my husband we had a joined account, but I am not part of his account anymore. 
How can I get that matter to be corrected? 
I called his bank but unfortunately they say I must contact the credit bureau. 
Thanks for your help. 
Sincerely, XXXX XXXX XXXX