Change wordpress domain name

After I tried changing my domain name from “www.sunrayswanderings.com” to “www.alexasearth.com” on WordPress.com a few weeks ago, I haven’t been able to access my website. I attached a screenshot of what I see when typing in “www.sunrayswanderings.com”. It doesn’t change when I type in “www.sunrayswanderings.com/wp-admin” or “www.sunrayswanderings.com/wp-login”.
Please help! I’ve had this issue for a while.
Thank you!