Telkom introduces new closer packages which are the same as smartvoice without data
https://www.techfinancials.co.za/2021/03/02/telkom-introduces-new-closer-calling-plans-aligned-to-smartvoice/
According to the Telkom website smartvoice packages are still available for Flla and start at R199pm with the 3000 min anytime. I would think you should be able to migrate to it once you are on a Flla device.....unless they changed the rules.