Experian is a pain for sure.
But you do need their credit report to be able to dispute.
If your free credit report is over 30 days old that is why they want you to buy another one.
It is a crazy I know.
If you have not recieved your free annual report you can do so. Go to their website and check around there to see if you can get a freebie.
You can only obtain once a year.
This is where they get you $$$
I had quite a battle with them.
I know how screwed up it can be.