New billing system is a disaster!!!!

In December my partner was charged double by mistake. Last month I was charged for data that was suppose to be part of my monthly package and was told it would be deducted from my monthly bill but would appear on my Vodacom app until the end of the month. Now on the first day of the month my bill on my app is more than double what it should be. You put up our contract amounts in the middle of our contract so have already ****** money from us once. Now you incorrectly charge us on more than one occasion. When I call the call centre I have to deal with *********** and clueless people. I have no idea what I am paying for, why I have been charged so much and I honestly cannot wait to cancel my contract with you. I don't have anything positive to say about Vodacom and would not recommend it to anyone!