Your account still exists. You just need to complete the merge. You can do this by logging into your dashboard: https://pokemonrevolution.net/dashboard/. Make sure you select the correct account as your main. For more information about it, check these threads out:
https://pokemonrevolution.net/forum/topic/88616-url
https://pokemonrevolution.net/forum/topic/90465-url
The client you're trying to use is not the most current one. A second Android client was released due to this issue. Here's the most recent download: https://mega.nz/#!JK5hnYTR!MGT3tTgYt8GVRLM9PdG-HXBmlcHmMSBsDDjfzkrMWIc
Before you download it, make sure you uninstall and delete the old client entirely.