MTN Black Friday Crazy amount billed NO HELP

I am Disappointed been on the phone since 7 this morning excuses from the system are offline from I can help you I must submit a ticket, I got two agents both with different answers. I was on hold for 3 hours went to the store and they could also not help.

i got a bill for R1780 where my statement shows double the stuff the month before and had a month before my data expired I paid for data on the 14th and they removed it on the 22 and charged me with 1780 with new data, so my app states i have to pay my normal amounts and the other state the crazy amount. one agent says it's my pay as you go data and I have used it already, which is crazy as my contract expired yesterday only got notification now, and the other agent the best one that actually gave me answers said its future-dated amount witch I don't get one side I am due the other side I'm not. I want to sort this out before I'm billed the amount I can not pay, and this will result in me canceling all my MTN devices.