Poor MTN service

I am so disappointed on the MTN service. I bought airtime on the 23 Sep 2019 but it never reflected on my balance. I called them they told me to send proof, I did sent the proof after being charged R12 of statement and one of the consultants told me that she escalated the call, she gave a ref no. Few days I called again.... The other consultant told me that the call was not logged... So she will log the complain. Today the 1st of October... I called and another consultant told me to send proof... I did and called her.... Now she dropping my call.