For assistance, please visit one of our authorized Service Centers to check it for you. You may refer to the link it will guide you to the nearest service center to your location https://www.samsung.com/ae/support/service-center/
We are sorry to know you are facing such issues. Kindly register your concern in the Samsung Members app (Samsung Members app > Get help > Feedback > Error report/ask a question).
Note:- Please send the device log files within 15 minutes of the issue occurrence with the exact issue details.