Missing Broadband Data

I have recently taken out a 24 month Telkom LTE data package consisting of 10 Gb (5 Gb daytime and 5 Gb nighttime).<br> I noticed that my data is being depleted at a very rapid rate (eg 3 Gb within a 20 hour period) without us actually consuming the data. This period was between 8pm to 5 pm the next day. No data was consumed as we entered the free 5 Gb during the night and 10 hours during the day (no consumption as we were at work.<br> I have contacted the Telkom call center twice and once visited a Telkom store.<br> There response is that I am consuming the data and there is nothing they can do.<br> I have requested that Telkom's technical department look into the problem but they refuse to do so.<br> I regard this as a breach of contract as I am paying for a service which I am not receiving in its entirety.