Vodacom over bill

Dear Vodacom. <br> 2 weeks ago I laid a complaint about the fact that I can't top up air time on my contract. service request ***. I still havnt recieved feedback from this. All i got was 2 gig data to shut me up probably? Now another issue I now have is that I get a debit order for R1165 while your app tells me bill so far R905. So why the difference? Your app is useless if it isn't accurate.