Apex domains cannot have CNAME records.
Question and response
Question
dig aphd.co.za. NS
Answer
aphd.co.za. 5 NS ns01.hkdns.host.
aphd.co.za. 5 NS ns02.hkdns.host.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0