Of course it did! You did not follow instructions.
You have to change the nameservers, and add the domain to your account. You never did that.
So now you have to do it again. Change your nameservers to epizy ones, then actually follow the instructions in the article I linked above.
If you want to use a subdomain, you need to add the base domain to your account using the article I linked above, then create the subdomain in the “Subdomain” section of the control panel.
Once you do that, you can change your nameservers back, and point the subdomain using the A records I showed above.