If you have already bought the domain name, you should be able to ask the company you bought your domain name through to help you "change the DNS name servers" for your domain. They should be able to give you a control panel where you can change it yourself (remove the name servers it is using) and enter these:
dns1.alwayswebhosting.com
dns2.alwayswebhosting.com
dns3.alwayswebhosting.com
instead (replacing any DNS name servers that are listed previously). If they don't give you a control panel to do it, you should be able to just ask them over email or phone and they should be able to just do it for you.
Once you've done that, please open a support ticket requesting a "Free Addon Domain" with your domain name and we'll set it up for you ASAP.