Theft of data

I have non stop problems with these idiots *****ing my data I put 1gig data and I'm less than 10 seconds Its completely gone These idiots keeps telling me the same **** they tell everyone that its my apps on my phone. Which its not because nothing has changed in many years with this phone. They have ptmjjdm nothing less than 10gigs since December and the reasons are always the same and NO ONE gives a **** about looking into the matter. You always get the same reply You apps are using data. They cannot say which ones since I don't have any app They blatantly lying