Promised feedback. STILL NOTHING AFTER 3 WEEKS!

I wrote a report on my iPhone 6 that I handed in on October 23rd. I still don't have the phone. I still have no idea where it is. I've called on the store in person only to be told I need to talk to Grant. Grant works from 9 - 5 weekdays. I've spoken to Grant once, 2 weeks ago. I've left him countless messages and heard nothing back. I received a stock standard auto-response on HelloPeter from Vodacom who thought my query was about billing! This is unacceptable. Someone who knows something about what's happening in the V&A Vodacom store (more specifically Grant), contact me. My phone has been missing for over three weeks. And I have turned off find my iPhone at their request. Last Tuesday I was told a Customer Consultant (Elroy Nathan Brickles) would contact me, I've heard nothing. What is going on? THE ISSUE HAS NOT BEEN RESOLVED.