Vodacom is ripping us off they are ******

this morning I bough Vodacom data for R29 i.e 100MB on 8.33 I got a confirmation that it's been activated . I was not on any network even watsapp on 8;48 I got a message that ive less than 24.0 MB available whilst I was not even on my phone thereafter another message followed on that i'm left with 10.0 thereafter message that i'm left with no data I must recharge with R10 . which is valid for today. This Vodacom they keep on chowing our data , when you call the contact centre the agent doesn't have an answer.

I need Vodacom to reverse my data .