Hello and welcome to Android Forums.
Some launchers give you the option to hide the status bar as Boneface mentioned. Going into settings/ apps and deleting the launcher data will undo any changes you have made with the launcher.
Have you by chance tried changing the DPI for your device?
Another option, and you will lose all your data, is to do a factory reset. That would be the last option I tried but it will work for sure. UNLESS that is, you have hardware malfunction or failure.
If you have any other questions regarding your device, I invite you to join Android Forums. We have many sections for specific devices which contain a wealth of information.