Apex domains cannot have CNAME records.
Question and response
Question
dig wmservice.com.do. NS
Answer
wmservice.com.do. 5 NS ns3.hostinger.com.
wmservice.com.do. 5 NS ns4.hostinger.com.
wmservice.com.do. 5 NS ns1.hostinger.com.
wmservice.com.do. 5 NS ns2.hostinger.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0