Poor care or customer complaints

I upgraded my phone last month to the new Samsung S7 EDGE. This was within a week of its launch which allowed me to make use of some of the opening specials. I got a deal which gave 2GB of data every month for 3 months. Came the end of march (30th) when my old contract expired and the new one came into play. (Lets not mention how the 31st of March I had not airtime or data or minutes as they messed up my contract change). It is halfway through April and I still have no data. I received a service number when i phoned the call centre with a promise to have it resolved in two days. I then phoned Vodacom Sandton a few days later, to which no one helped me still. I was also informed that the Samsung VR headset would come with the phone at that point. However I explained that my parents had the phone and I cant use Samsung rewards till a little after the deal ended. I was assured that Vodacom would make a plan because I bought my phone before the required date yet no one at Vodacom wants to help me receive the VR headset that I was promised. Vodacom gives pathetic service. This is probably my 4th or 5th time on this site for Vodacom. Why must it always come to this for help?