Access to old account

How I can get access to my old account?
I used it on the old forum like here

But link to the user doesn’t work:

It looks like this account doesn’t exists
I used Google Account to log into it, but now only Github is supported.

Hi Tomas
Looks like you had two accounts previously on our previous forum Get Satisfaction.
We would have sent you activation emails for each of them, but it looks like you only clicked on the activation links for one of them.
I’ll message you privately with the email address that Tomas_Prochazka is linked to.
Best regards