Hi Eva,
Regarding wordpress: just to be sure, have you modified your hosts file as indicated in the previous messages?
Your user exists only on the staging server and not in production, to make it work you have to configure your hosts file by adding this line:
fonsvinum.com 81.201.5.181
Regarding FTP, what client are you using? Can you tell me how it’s configured?
Because I’ve tested and double checked it and I can access both FTP and WP dashboard with those credentials