Thank you so much for reaching out to us. We understand the inconvenience you have faced in past. We sincerely apologies for the same. Further if you are facing any issue with the device currently. We request you to please follow the below mentioned path and share the same with us so that we can investigate further and give you the best possible solution.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > send feedback > error report/ask questions).