I accidentally deleted the app. Do you know how can I get back my account and continue from where ..

If you had previously logged into a facebook account to sync your game progress then you should be able to reinstall the game and log back into facebook in the game and you will have the option to restore the progress.

If you didn't do this then I don;t think there is another way to get it back. You can try contacting the game support to ask if they can find your game details in some other way. Check the support page for the developers contact details.