here is it who you can do it ok see it is very easy it has 5 steps.
step 1. ok go to https://billing.gamigogames.de
step 2. log in with your gamigo account
step 3. click my profile
step 4. click details
step 5. that was all here you can change det password
here is some thing i say you must change to, the gamigo password
step 1. ok go to https://billing.gamigogames.de (must not be done if you are already logged in)
step 2. log in with your gamigo account (must not be done if you are already logged in)
step 3. click my profile (must not be done if you are already in profile)
step 4. click pers data
step 5. here you can change the password and some more thing's.
hope this guide will help some ^^ this is not only for girate galaxy but for all gamigo games ok
or like the GM did say use support or bigpoint
