Apex domains cannot have CNAME records.
Question and response
Question
dig shimahosting.co.za. NS
Answer
shimahosting.co.za. 5 NS vpsns1.cpt.wa.co.za.
shimahosting.co.za. 5 NS vpsns2.cpt.wa.co.za.
Authority
The response has no authority records.
Additional
vpsns1.cpt.wa.co.za. 5 A 41.185.64.10
vpsns2.cpt.wa.co.za. 5 A 41.185.64.11
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0