Can't access Plugin Dashboard

Hi there. I just got your plugin for a trial, but I can't add it to my website:

The message I get is:
This domain has previously been registered with WPMU DEV by the user Vikash(s***** To use the dashboard plugin on this domain, you can either login with the original account (and upgrade it if necessary), or upgrade your trial to a full WPMU DEV membership.
Upgrade membership More information »

Can you please remove my website from this account?