Samsung Galaxy S21 Ultra (S&D) (Open Box)

I loved this phone when it first came out,, I went a head and purchades two of these. I haven't even had them a month, the screen turned off and will not turn back on. There is no flaws, drops, cracks or anything. I am very disappointed. I have reached out to the suppliers and they will not return my emails what so ever. Every morning at 4am an alarm goes off on this phone and i can not turn it off due to the screen.i want a refund!!! update!! i got the phones around the end of febuary. currently BOTH phones will be sent back. the first one the screen turned black but all notifications still work on it even with the screen black. the second phone kept acting funny like someone was pushing buttons to freeze it up on the charger but i wasnt using it. I finally restarted the phone and tried to log back in and now my pin number wont work. these phones were amazing when i first got them in like 2020/ i have NO clue what is goin on right now with these phone and the customer service but i am very disappointed and want a refund both phones will be shipped back today!