Accidentally bought tickets twice

A question about : Accidentally bought tickets twice

My husband bought 2 tickets to go to a convention. He forgot he had bought them and then bought 2 tickets again.

He bought them with the same credit card but they were bought a few months apart.

The company say that the financial transaction has taken place so therefore he cannot get a refund.

They were bought with the same credit card. Is he able to get a refund even though the company say no? (No tickets are posted as you have to print off the scannable coded).

Best answers:

• what are the T&Cs on the tickets?
  If the company have said no I assume they are non-refundable
  Are you allowed to sell them on?
• If you mean can he get a refund through his credit card, then I would say no as you can only do this if for example the convention was not going ahead, but the company could not/would not refund.
  Have a look at the convention T&Cs as could well say something about non-refundable tickets.
  Can you not try to sell them on?