Data usage billed is incorrect, impossible

I bought 60 GB of data on the Telkom LTE mobile solution, which should last at least 6 to 9 months with my wife and myself's data history. BUT within one month all was used up. We could not believe this but recharged another 60 GB. Again within a month it was finished.<br> I then changed the WiFi password, a week ago, incase somebody used our data. <br> After I changed the password (Which only myself and my wife knows), we recharged again. But this time I kept track daily of data usage on the Telkom Mobile app on my iPhone.<br> Between Sunday 18 Oct and Sunday 25 October Telkom mobile reports we used 2GB in 1 week. This is impossible. The strange thing is that we went away the weekend 24 Oct and returned Monday 26 Oct. According to Telkom we used 1GB whilst we were NOT EVEN AT HOME. Telkom, sorry, but we do not trust your data usage tracking, and feel totally exploited!!! I would like to see detailed usage figures please.