Help with Nameserver

Need help.

So an domain, lets call it, domain.lv is listed on another web hosting provider.
So on my cwp, my side will host the subdomain only - hk.domain.lv
The web hosting server added my IP for hk.domain.lv that host domain.lv
But I think that it has not added my nameservers, I use free or ns1.centos-webpanel.com. and ns2.centos-webpanel.com.
On leafdns site I get:

The parent nameservers do not have your nameservers listed
This means the name does not exist or your registrar is experiencing technical difficulties.

So how to fix this? Do I need to add some records or the hosting provider needs to add my free NS in his records?
Please help. Urgent!

u need to add the name servers of free dns first then add subdomain record under free dns

At my side in free dns I added domain.lv
Then opened the created record domain.lv and I added A record hk = hk.domain.lv and ip
Everything is OK - green

Thats all???

Another thing, how to correct add the subdomain webpade - I mean
1.adding domain.lv to my domains and then adding an subdomain hk.domain.lv
2.adding subdomain hk.domain.lv in domains - I guess this is not correct, but it should work, maybe?

Or when creating free dns I need to add the web hosting provider name servers instead of mine?

Default I get
Primary NS: ns1.centos-webpanel.com
Secondary NS: ns2.centos-webpanel.com

Need to replace ns1.centos-webpanel.com and ns2.centos-webpanel.com to hosting provider name servers?
Please help understand!


When I open

Viewing zone   
Delete
DNS Zone Test
zone upb.lv/IN: loaded serial 2018020101
OK

Domain nameservers are set to:
ns2.hp.lv
ns1.hp.lv

You need to set your domain nameservers to:
ns1.centos-webpanel.com
ns2.centos-webpanel.com
ns3.centos-webpanel.com
ns4.centos-webpanel.com
ns5.centos-webpanel.com

*if you want that your dns records works!

and so on.....