Serious domain problems

I messed up first the domain wouldn’t work kept saying that the domain was used by another account so i tried deleting the website to start over and now it keeps saying I am a member . I am completely stuck have know idea what to do

I’ve been having the same issue. The domain I chose WAS available, but I think one thing Ilya missed in his tutorial video, was perhaps to wait until the URL is registered before setting a custom domain in your account?? I registered the an available domain last night and immediately thereafter set it up as custom domain, as per tutorial. This morning, many hours later, it still didn’t work. I clicked “set custom domain” again when it said “domain is already being used by other account”

Why is this happening?