Ticketmaster Unsuccessful Refund

I purchased 2 tickets for the Justin Bieber JNB event that was cancelled. Ticketmaster notified us that a refund process will be initiated and if the refund is actioned to a bank account that has been closed, the system will reject it and we will be asked to share new banking details for the refund to be effected. I used to bank with Nedbank and used a card linked to that account to purchase the tickets from Ticketmaster. However, my account with Nedbank has been closed and all cards were cancelled. Today I got an email stating "Refund Successful" which is impossible as the funds would then have to be refunded to a closed account. I reached out to Nedbank and they notified me that in a case like this, the funds would not clear and be returned to Ticketmaster. I have raised a query a few weeks back with Ticketmaster and did submit my new FNB banking details to which I wish to have the funds returned. Ticketmaster stated that in the "Refund Successful" email that if it is a case where an account has been closed, I need to raise the concern with the issuing bank. I did that and they said it is an issue that needs to be followed-up with Ticketmaster. Please assist in ensuring the funds are returned to me in my new FNB account. Ticketmaster Support seems to be unhelpful.