Sick of Vodacom over charging me

I have never had such high bills as Vodacom keep charging me, it’s crazy to think my bill was R4650 this month when I’m on their VIP red package with 10Gigs of data and yet they tell me I’m running out of data, there is no way I’m using that amount, Vodacom keep *****ing me over with my accounts and I’m tired of going through this month after month, I can’t understand how they getting away with this, I’d like someone to please sort this issues out once and for all as I should not be paying such a high bill