Bad MTN service

The service champions on this BIG platform are not really champions. I had R23 airtime yesterday morning when I purchased a R6 combo of 200mb and 20 minutes All NET, so when my 200mb depleted I decided to buy again but was unable to due to insufficient airtime balance. When I then reached to the "service champions" after numerous attempts to speak/ ask about my disappeared airtime I got through to an unwilling agent who told me that I made a call that charged me R14 something and then the call disconnected and she never even bothered to call me back. I phoned again to get to another "service champion" who told me that I sent and SMS that charged R14 something. I was so furious I asked to speak to one the the supervisors around. Haiibo got to a very proud guy by the name of Buleleni and he told me that i was subscribed to something that took my R14.99 I further asked him why how his "service champions are translating a different story he then said their system shows "EVENT". He then further instructed me that I should open my MTN APP of which i did but showed nothing R0. I think MTN should just let go of the name " Service champion " because they are clearly not living up to that name. Now i am without airtime and no idea how will I solve this