Hi Mr.
More than one offer, i'd like to say you should not use this feature; this because the asterisk recording solution work fine, however, the use of an manual digit function allow human mistakes and is not according to PCI, so, my recommendation to you is one IVR with card number, CVC and date reading, so you can accomplish the PCI and security standards on finnancial sector.
This time is on me.
Best regards.