Refunds can be pretty complex to be honest.
Firstly, the refund will be sent from AirBnB to your bank or credit card company.
As far as AirBnB are concerned, this is the end of that transaction.
Now it's down to the bank or credit card company.
Ultimately, the bank or credit card company will try to refund your card with the normal card number. This card number will still be on file against your account for years to come, even though it has expired. This is so that issues like this can be resolved quickly. Failing that, it goes into a holding account, and they will try and get you your money back into your account. If they fail to track down your account, they tend to hold the money for about a month in this holding account. During this stage, you may contact the bank or credit card company who will in turn find the transaction based on the details etc and then be able to match it to your account and pop the money back in.
If after the month, it still has no where for it to go, it is then rejected and bounced back to the very first company, in this case AirBnB. At that point, AirBnB will be able to contact you (you may need to contact them) and they will be able to start the ball rolling again to get you your money back.
However the entire process can take over a month and this is standard practice for any refund.
Just a waiting game now.
Good luck and I hope it's the first option where it will automatically find its way to you.
