NEED URGENT ASSISTANCE , NO HANDSET RECEIVED 3 MONTHS AFTER UPGRADE

I upgraded one of my MTN lines on 1 April 2019 as I received a phone call from an upgrade agent which I only now learn from MTN was a consultant from Summer Sun Trading and not MTN itself. My upgrade was done as I receive the monthly data as requested BUT UP TO DATE I HAVE NOT RECEIVED MY NEW HANDSET and it is already THREE MONTHS later. I contacted MTN a few times, also sent an email. Tried to phone Summer Sun Trading ever since but for one or other reason the call cut's off or is not available....PLEASE I NEED URGENT ASSISTANCE TO RECEIVE MY NEW HANDSET AS TO ME IT NOW SEEMS AS IF ***** MAY BE INVOLVED BUT I AM NOT 100% SURE YET AS I CANNOT GET THIS MATTER RESOLVED. Documents can be checked, I have not signed for any new handset delivery. Line upgraded was ***. I can be contacted on ***