My panasonic DMC-GF7 wont turn off and the screen is getting stucked

Hello, i need help. When i turn on my gf7 after few mins the screen is getting stuck and i cannot turn it off. The only way to shut it down is by removing the battery. I cant use my camera because of this issue. Please help me.The only buttons working are the shutter button and playback button. But as I said, few mins. later the screen freezes. I am hoping that you help me regarding this issues. Thank you