WiFi data depletion unexplained

I am trying my utmost best to get assistance with the WiFi contract I have with telkom.the data gets depleted in a blink of an eye.ive been to the branches but agents are not competent and cannot explain how 5gigs is used in a day. I'm so disappointed with this company as nobody is helpful my recent reference number is ********** it's 4days waiting for an outcome still nothing.my previous reference is ********** for the same enquiry still no response. I'm so irritated that for such a huge organisation queries cannot be resolved. I'm using this platform now.my last resort is going to consumer act to report this ****************. Can someone please assist me.