Hello,
The support answered me that the only solution is to create a new account with a new email address.
That's the answer (Google translated):
"Dear customer
Good morning ,
Thank you for your patience .
I have the response from our experts who inform me that the account with the email address: .......... is not registered on the forum.
Unfortunately, due to technical limitations, registration on the forum via the specified email address is not available.
The solution is to use another email address for registration on the forum.
Sincerely"
