Apex domains cannot have CNAME records.
Question and response
Question
dig reflex.co.za. NS
Answer
reflex.co.za. 5 NS ns1.reflex.co.za.
reflex.co.za. 5 NS ns2.reflex.co.za.
reflex.co.za. 5 NS ns3.altostratus.co.
Authority
The response has no authority records.
Additional
ns1.reflex.co.za. 5 A 41.79.241.141
ns2.reflex.co.za. 5 A 41.79.241.142
ns3.altostratus.co. 5 A 52.57.24.138
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0