I located your account in our system. Is there a possibility you used a capital letter in your username? Since the username is your e-mail account, and e-mail is not case sensitive, some users have wound up with this issue because the username is case sensitive, and they used a capital letter when signing up, but then forgot that they had done that.
I sent you a ticket from our Zendesk system. Please respond so I can dig deeper into your login issue.