are there way to change from portrait to landscape mode?

Hello, this problem is indeed known. It is often due to the internal gyro sensor (which detects the position) or a software glitch that a normal reset does not fix. Based on similar cases and support documents, I can recommend the following:

• In many cases, a normal factory reset will not help because the sensor calibration or deep settings are not reset. Instead, you need to enter the hidden service menu (BIOS-like) with a Samsung remote (original remote, not universal; if not available, get one or contact support).

1. switch off the device and unplug it for 1-2 minutes
2. plug it in, but do not switch it on.
3. point the remote control at the back of the device (where the IR sensor is, often at the bottom or back; the red LED flashes when pressed).
4. press these buttons on the remote control in this order: MUTE (release) > 1 > 8 > 2 >Power ON. You will hear a click from the board and the device will enter the service menu (can be black and white or text based).
5. navigate to Options > Factory Reset (or "MRT Option" > Reset) using the arrow buttons on the remote control (hold towards the back!).
6. confirm with the middle button. The device resets completely and should start in the initial setup (landscape mode).

Let me know if this worked for you.