CNA Doubles Online Order Charge, Refuses to Credit

I placed an order for an Xbox One console on the CNA Online page. There was an error and the order was doubled. CNA Online does not have a phone number to call, just an e-mail account, so I mailed them requesting a fix. They assured me this would be done, and I would receive only one order. I received one order but have been charged for two. After trying to mail, call and even go into CNA the most recent statement still reflects the double payment. Every time I have mailed them I am told a ticket has been created, they don't supply a ticket number so follow ups are impossible.