Vodacom stole from me

On 30 October I purchased a data bundle via the Vodacom App. The following day, 31 October, I saw that my balance was zero. I can see the purchase notification in the Vodacom App, but when I phoned to ask what had happened to my data, the nice lady I spoke to could find no record on the system, and she tried hard. What happened to my data? Vodacom stole it from me.