> What do I need to do to stop all e-mails to***@******.***, and register a new address
Yes, all essential contacts should be advised.
Just in case you missed some key contacts who may send you to the Hotwire address later, you may enable email forwarding from the previous email address to new Gmail one. Once the previous email address has been well associated with the Gmail one, you can even send outgoing emails as previous email address though you actually write and send using Gmail.
As Gmail is very good at filtering spam emails, you should be no longer see those "hot" emails again though you can keep receiving useful emails from the previous mailbox.
Hello, are you still there?
Did the above suggestions help?