NO SERVICE BACK UP

I have a SAMSUNG UHD TV under a year old only with a picture that keeps disappearing and leaves me with sound only.<br> Samsung have repaired it but still no picture. they have been back to collect the tv and I have called 5 times over the last 8 DAYS to find out when what or how they intend to return it and all they can tell me is they will call me back. \Well that never happens they just don't return calls"<br> THERE IS NO CUSTOMER CARE OR BACK UP WITH SAMSUNG TVS UNFORTUNATELY."""