Haha...clearly the airline intends to debit Cheapoair for the ticket and Cheapoair has a problem because you did a charge back with your credit card issuer/your bank and your bank has reversed the charge/returned the money to you. I suggest you answer Cheapoair that you contacted Cheapoair within 24 hours of buying the ticket on their website, to cancel the ticket and get a full refund and if Cheapoair failed to inform the airline about the cancellation within 24 hours, it is their problem and not yours.

Cheapoair has no possibility of blacklisting you with the airline; they are trying to scare you.