What should I do if I haven't received my username and password for TM30 reporting despite a successful registration?

I hate to take up your time with this, but I am not sure what else to do. About 3 weeks ago, I submitted information so that I could set up an account for TM30 reporting. Subsequently, I got an email from Immigration asking for me to confirm my email address by clicking on a link, which I did. Last week, I checked the status which now says "Register successfully", but I never received an email from Immigration with a prescribed user name and password. What do I need to do to finish the process of registering so that I can submit TM30's online?