Bad Service received in response to urgent queries

I receive a 2GB data package every month. This month the data bundle dissapeared without a trace without me being able to track the source/ nature of depletion. On 05 August 2015, I urgently went to 14th Avenue MTN office to address the issue and received bad service. Firstly when i explained my issue to the consultant i was advised that i had to wait for a technician, i then waited over an hour for a technician to arrive. The individual (Gordon Hlongwone) who finally did arrive was NOT a technician and advised me that he would assist and provide me with feedback in a comprehensive report which COULD explain the depletion of my data. I have still not received any report. Mr Gordon Hlongwone provided me with his contact details and advised that i could contact him anytime. Everytime i have attempted to contact him- he IS uncontactable! I have knoweldge that MTN's competitor has a bug in their system causing the depletion of data. I have not received any adequate feedback or assistance from MTN as regards this urgent issue. I am paying for a service that is defective! I am extremely disappointed with the manner in which long standing customers such as myself are being treated!