Vodacom taking data off an account that is not active yet!

I began a wifi package which kicked in on the 1/6/19.. Today. Despite the fact that the router is blocked due to the fact that I first need to remove the pin off the sim, there is already data missing from my account. In short....data is missing from a package that is inactive. After 2hrs on the phone with Vodacom I could not get answers,despite the fact that they confirmed that there is in fact data missing...and that it is impossible due to the sim still being blocked.... This to me is ***** or theft...