Have no idea when parts for the S5 will arrive

My 6 month old Samsung Galaxy S5 needs to be repaired. There is apparently a hard ware issue as the screen jumps and the phone just stops working/ freezes. Samsung Smartcare in Century City could not tell me if and when parts will arrive to repair it. I have been chased from pillar to post with promises of return calls. Nothing so far! Disgusting Service from Smartcare and Samsung Head Office. I was told just to wait! Only in South Africa will this happen!