BAD BAD CUSTOMER SERVICE

I logged a dispute with Experian in March for my credit report to be updated. They did that and sent me an updated credit report, to my surprise when I checked my credit report a few weeks later, the account that was supposed to be closed was put back with a status of account in arrears for 9 months. I emailed them to query that. It has been a month now, no one is getting back to me. I called all their numbers, you are put on hold for more than an hour, they keep saying they are experiencing a high call volume. This is now frustrating as I need my credit record fixed. Someone please help. Nthabiseng