If you need to connect to another server, you can do this through the game client.
While in the Port, scroll through the left options panel at the bottom and click on the «gear».
Next, select logout.
Click on the name of the server you are on to see other possible options.
Please note that you will need a different account to connect to another server, or you will need to create a new one. You will not be able to use the same game account and progress on different servers.
If you have any problems, you can always contact us at support@wowsblitz.zendesk.com