Apex domains cannot have CNAME records.
Question and response
Question
dig etigraf.com.co. NS
Answer
etigraf.com.co. 5 NS ns13.wixdns.net.
etigraf.com.co. 5 NS ns12.wixdns.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0