Data disappeared

I bought 2GB of data from Telkom which normally lasts me about a week, and it expired within a few hours even though I used it as I normally do. When I contacted the call center, they tried to blame it on third party apps. I KNOW for a fact that is not the case, because nothing has changed from my data usage patterns. What happened to my data, why did It disappear just like that in a matter of minutes? I need answers and my data back ASAP, this is unacceptable at all.