Poor Service From MTN Helpline

For the past year or more I have had several monthly run-ins with the MTN call centres, the service is lacking in every regard, from understanding to actual assistance for the most part. Recently, 2nd of Dec 2015, I contacted the service centre regarding a missing data bundle, over the course of 9 days I had to call back everyday, spoke to 5 different supervisors of which I can only clearly identify Nita, Bella and Wistaf. After every call I was promised a call back, the 1st only came 2 days later and was only to inform me that the system shows my bundle is there and it will only show after 12 midnight. I then went on twitter and tried to contact someone there, to get a reply 2 days later once again asking for my details and no further contact for another 3 days until, while speaking to the 5th supervisor, a 3gb data bundle suddenly appeared on my account. Subsequently I received a tweet notice that I was reimbursed for my missing data. Yet, not the end of my complaints, I had several queries besides that. Most importantly, the fact that MTN advertises/sends txts saying that if you use a certain amount of data before a certain date you will get x amount of data which I didn't get.