Cancelling service

I have had a site I created on Homestead for a few years and was pretty good - got into google #1 maplisting for my area (the url, that is) I have just had a local company design me a new intertactive site that is now connected with my domain name url. Therefore I want to now cancell my homestead service however ensure that it does not interupt my new website or the domain name, which i believe should not change as I own it.

So basically i want to cancell my homestead service.