Apex domains cannot have CNAME records.
Question and response
Question
dig ns02.starsoft.co.za. NS
Answer
ns02.starsoft.co.za. 5 NS ns2.dan.com.
ns02.starsoft.co.za. 5 NS ns1.dan.com.
Authority
The response has no authority records.
Additional
ns1.dan.com. 1 A 97.74.98.67
ns2.dan.com. 1 A 173.201.66.67
ns1.dan.com. 1 AAAA 2603:5:2125:0:0:0:0:43
ns2.dan.com. 1 AAAA 2603:5:2225:0:0:0:0:43
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0