two websites - only want one that is hosted here.

I have a domain hosted here at Homestead (www.highpointequestrian.org) I like this website and want to keep it as my primary. I also have a website domain (www.highpointequestriancentre.ca) that I recently purchased from my marketing company. They built a website that I do not want. They have let it go and I now own the domain name (which is registered thru Whois) - how do I get it under the Homestead hosting and then eventually I want it to be inactive.

I have been thrown all over the place on this. This secondary site comes up higher in the google searches which creates huge problems because it has inaccurate contact info etc. Help!