Problem with registration code(s)

[HubCapDude]

I just received the email to upgrade to the new release of Microstudio. I downloaded it and setup immediately removed my current version. When I went to install the new version, it required a registration code. I was directed to my "Account" page at mtu.com and there I found 4 registration codes from my last upgrade, none of which work. What am I to do? Tech support says that they do not return phone calls so I did not leave a message. What do I do now?