Transferring Travel Voucher to Credit Shell
 

Has anyone had success transferring a Frontier Travel Voucher to their new Credit Shell. I love that you can use Credit on multiple flights rather than a voucher which you can only use once. I tried to book a $253.40 flight with $250 Voucher and cancel AFTER 24hrs (with fee-free cancellation until Feb 28) in the hope they would reissue it as Credit. Unfortunately, they just showed up as a Voucher Adjustment.

PAYMENT: VOUCHER
Total $250.00 Payment Date 01-19-2021 Payment Type Voucher ***Approved***

PAYMENT: AMEX
Total $3.40 Payment Date 01-19-2021 Payment Type Credit File ***Approved***

REFUND: VOUCHER ADJUSTMENT
Total $-250.00 Payment Date 01-21-2021 Payment Type Voucher Adjustment ***Approved***

CUSTOMER CREDIT: TRAVEL CREDIT
Total $-3.40 Payment Date 01-21-2021 Payment Type Credit Shell ***Approved***

Does anyone else have any ideas in extending or transferring vouchers?
Thanks!