5321 Shop Your Way Visa closed my account as “fraudulent” after I reported fraud??

Applied for the 5321 Shop Your Way Visa ~2 months ago for the 50k SUB. Been using it normally.

Last week I reported some fraudulent transactions, and they blocked the card. Now I just got an email saying my application itself was fraudulent/identity theft — and they’ve closed my account.

This was a legit application, so I’m really confused.

Anyone dealt with this before? What should I do next?

Below is the mail I received.

We are writing in response to your notification that you may have been a victim of Identity Theft, and that you have no knowledge of the above referenced 5321 Visa Credit Card account.

The status of the above account number is closed, and we are currently investigating it as a fraudulent application. While we investigate your claim of possible Identity Theft, we will suspend any collection status or negative reporting to the credit bureaus.

In order to assist us with our investigation, please return and sign the enclosed Statement of Fraudulent Application within fifteen (15) days at the address listed below: