How can I transfer my student visa to a new passport while in South Africa?

The user is going back to South Africa for a holiday and will be obtaining a new passport while there. They are currently on a student visa and are inquiring about how to transfer their visa to the new passport. They ask if this can be done in South Africa or if it has to be done in Thailand, and they seek guidance on which passport to use for re-entering Thailand. Comments clarify the need for a re-entry permit since the user has an extension of stay, and they are advised to use both passports when entering Thailand.