MTN is not taking accountability for their stuff error and misleading customers

I upgraded my MTN contract last week. I chose the package of 150G anytime and 150Night for R 349.00 pm for 24 months. To my surprise, they don’t load what I agreed on. I decided to call customer care line and they told me that my contract is 50G for R349.00. I logged a complaint and requested for the call recording. The agent tells me that it’s not possible to get a call recording. What kind of **** is this? MTN is so useless!