my web address keeps redirecting to host website

i am new to creating with wordpress and websites in general. I have a blog and i was combining my other web address with it, but used my .com address by accident. I doubled back and corrected all of my mistakes but now i want to edit my .com address, it redirects me to my host’s webpage. I have no idea how to recover it. Both .com and .co.uk i have bought already. I will appreciate any help. thank you