Hi there - hope you're well, and happy to help clarify 🙂
Your hosting appears to be confused --- you don't need to install / buy anything SSL related, you can use Ezoic SSL:
https://support.ezoic.com/kb/article/using-ssl-with-ezoic
Also, the error you're seeing needs to be addressed by locating the hosting DNS, not the NS assignments:
- Take your Hosts DNS records (https://support.ezoic.com/kb/article/where-to-find-dns-records-zone-files-at-your-host) and locate the A, CNAME, MX and TXT records. (You do not edit/change these, they are simply the master copy of the DNS used for reference when changing the Ezoic DNS)
2.Then, access the Ezoic DNS (https://support.ezoic.com/kb/article/how-to-update-add-dns-records-and-subdomains) and make sure there are exact copies of the Hosts' A, CNAME, MX and TXT records showing with Ezoic DNS.
-- If they don't exist, create new ones.
-- If they already exist, but have incorrect values, update the existing records (hit the pencil icon next to the record).