Apex domains cannot have CNAME records.
Question and response
Question
dig globalgate.com.ar. NS
Answer
globalgate.com.ar. 5 NS dns1.globalgate.com.ar.
globalgate.com.ar. 5 NS dns3.globalgate.com.ar.
globalgate.com.ar. 5 NS dns2.globalgate.com.ar.
Authority
The response has no authority records.
Additional
dns1.globalgate.com.ar. 5 A 200.0.185.100
dns2.globalgate.com.ar. 5 A 104.236.49.158
dns3.globalgate.com.ar. 5 A 201.222.41.98
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0