How do I change displayed address of wordpress pages?

Okay this is my problem. I am not even sure it’s a WordPress issue or not but I built my website before my domain finished transferring and it’s under a different domain. I guess it’s a sub-domain if I understand things correctly. Anyway I built the site now the homepage show the address bar as https://trentjperezcom.ipage.com/mysalvagedstyle/ the domain has finished transferring and the site is at https://www.mysalvagedstyle.com so if I am not mistaken the homepage should display https://www.mysalvagedstyle.com/ for the homepage. NOw how do I get it to display correctly. Do I have to change all the permalinks? Do I need to change a setting on my domain? do I have to reinstall my entire site again? I am not an expert in domain management by any means. I just need this to display correctly Can anyone help me figure out what to do and how to go about doing it?