Apex domains cannot have CNAME records.
Question and response
Question
dig benzahosting.cl. NS
Answer
benzahosting.cl. 5 NS server-dns1.benzahosting.cl.
benzahosting.cl. 5 NS server-dns2.benzahosting.cl.
benzahosting.cl. 5 NS server-dns1.benzahosting.net.
benzahosting.cl. 5 NS server-dns2.benzahosting.net.
Authority
The response has no authority records.
Additional
server-dns1.benzahosting.cl. 5 A 131.72.236.10
server-dns2.benzahosting.cl. 5 A 131.72.236.10
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0