Apex domains cannot have CNAME records.
Question and response
Question
dig service-solutions.com.ua. NS
Answer
service-solutions.com.ua. 3 NS nsa4.srv53.com.
service-solutions.com.ua. 3 NS nsb2.srv53.org.
service-solutions.com.ua. 3 NS nsc3.srv53.org.
service-solutions.com.ua. 3 NS nsa3.srv53.org.
service-solutions.com.ua. 3 NS nsd1.srv53.net.
service-solutions.com.ua. 3 NS nsb2.srv53.net.
service-solutions.com.ua. 3 NS nsa1.srv53.net.
service-solutions.com.ua. 3 NS nsc1.srv53.com.
service-solutions.com.ua. 3 NS nsb2.srv53.com.
service-solutions.com.ua. 3 NS nsd2.srv53.org.
service-solutions.com.ua. 3 NS nsc2.srv53.net.
service-solutions.com.ua. 3 NS nsd1.srv53.com.
Authority
The response has no authority records.
Additional
nsa1.srv53.net. 3 A 5.39.10.94
nsc1.srv53.com. 3 A 78.27.225.73
nsd1.srv53.com. 3 A 89.184.64.99
nsd1.srv53.net. 3 A 89.184.64.68
nsa1.srv53.net. 3 AAAA 2001:41d0:203:dee4:5:39:10:94
nsc1.srv53.com. 3 AAAA 2a02:2279:0:1201:78:27:225:73
nsd1.srv53.com. 3 AAAA 2a02:2278:70eb:298:89:184:64:99
nsd1.srv53.net. 3 AAAA 2a02:2278:70eb:298:89:184:64:68
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0