loaded R300.00 airtime for 1GB and then R150

loaded R300.00 airtime at 8:25 in the morning then loaded a 1GB data bundle from the R300.00 airtime I was then suppose to have R151.00 left as normal airtime? a few minutes after loading the airtime and data I tried to phone some one but only noticed that I don't have any airtime left. phoned Vodacom to ask about what happened to my airtime I loaded a few minutes ago ,their response it that it was used on the internet? it would take then from 24houes to 48 hours to more than a month? to resolve this? their supervisors does not how to talk to customers at all they keep on trying to over power you every time you try to say anything!!!! they don't belong in the position if that's how they deal with customers!!! after how many calls to Vodacom, I receive a call from Vodacom saying that they will only give me R150 back because I used 1GB of DATA in about 45minutes ????? please proof that???? a 1 GB data bundle last me a month!! it can be seen on your systems???? not to mention that my contract is only a month and a few days old and this is the third problem with Vodacom!!! Vodacom steels airtime and customer service does not know how to deal with a customers!!!