Complain About Samsung South Africa

i have take a contract from Telkom for a samsung Galaxy s9 plus the phone has gone green on the screen i have phone samsung to complain about the phone 3 mouth back after all the complaining and been told to soft start the phone and the it fine for 15min then turn green i the contact them again to complain again they told me hard reset the the phone its been going on and off like this for last 3 month i was told to backup my phone and reload it again it work fine the a day later it turn green again ! i contact agent at Samsung that told me to take in the phone i ask for a Samsung store and not 3rd party store they told me that the store in 4ways is Samsung store after they rep**** with a Quotation it was from a other company called The Digital Experience i was shocked that Samsung **** to me !!! After handing in my contract to tell that warranty has expired 1 week before handing in the phone i check to see when we collect the phone from Telkom and it was still in time for repairs the screen was not broken it has never dropped it is in mint condition . i contact Samsung to log a complaint a lady called Reja she never wanted to give her Surname she say do hand her surnames to people i keep begging her to transfer me to complain she keep taking to me like i was child and never wanted transfer me to her complaint department as consumers get treated bad by Samsung staff