Ranks will need to transfer over,
Head over to the treasurewars discord at discord.gg/treasurewars and submit a ticket via private messaging the mod mail bot which will be a role below nitro boosters and 1 role above normal guests/members!
How long ago did you go onto the server? Pirate is closed until the 4th of January. You shouldn't be able to log into pirate. If you want to recover your classes you would have to contact a Sr Mod+ With evidence (Could be a screenshot, purchase confirmation etc.)