Vodacom billing

Recently I was overseas and I happened to use the Vodacom roaming inclusive of the data roaming, they billed me up to R11,000 Stating that R9000 Was accumulated through data usage during this time at one point I may have used 30 gigs for one connection, I have requested proof of what is it that I could’ve been doing with the Internet for so much, they have failed to provide this proof but instead went ahead and took my money from my account. I obviously can’t afford to dispute the transaction and reverse it because then they will close my line , black lost me and I won’t be able to make any business transactions and phone calls since I use my phone for that. Its a David vs Goliath saga ,I have notified the agents that I will go as far as the CEOs office to bring this to the attention that data is not that expensive -and even if I were to Be roaming which I always do every month and every time other time I am out of the country I have never been charged like this before and what makes it worse is there is no logical explanation as to what happened. The last agent I spoke to mentioned that I may have connected one on board the plane but that’s not true because I bought the data on the plane as I always do and I’m never charges like this another logical explanation would be I was downloading while overseas but this didn’t happen I have requested for an itemised billing statement for the data usage in particular to no avail, So In short I am saying if you are travelling stay away from roaming from Vodacom just by eSIM and avoid all the carnage and bullying tactics . I will make all the relevant noise on any platform available to my finger tips to alert unsuspecting customers of such ************ behaviour by a corporate giant .