Bad service and inaccurate information

my battle first started after issuing the ticket ***788), then wanting to upgrade using miles or even possibly pay the difference for the JNB-NYC flight. I started by calling the contact Centre on Friday afternoon the 27th of Feb to check availability and costing, I was told the fare was too complex to calculate and they would send a message to fares and queue it off and I was to call back Monday morning to do the necessary. Simple enough. Monday I called and was advised yet again fares had not calculated the fare, they would send another message and to call in 3 hours, this went on most of the day. Tuesday and Wednesday the same story being passed from pillar to post, kept on hold, calls cut. I then contacted the Customer Services in desperation and they put me through to Team Leader who assured me she would take me case on personally and resolve the matter for me. Her end result was that there was no availability on the NYC to LasVegas flight so upgrading the JNB NYC was not possible at all. Only to learn later there is no Business class cabin on that flight at all? Unable to upgrade booked a seat near the front window and traveled Economy and the seat mechanism broke!