Vodacom, *****ing our airtime

Worst customer service received by vodacom. On Saturday morning I received my monthly airtime and data (R750 and 250mb data). Once exiting my home that has wifi I started to receive messages reporting that I have depleted my data bundle and that I had no airtime. I contacted vodacom as it was impossible that I could’ve used it all. Seeing that my mobile was definitely connected to the wifi and not even being in use. I was told I used it all within one hour, this was not the first time that this had happened. The more I tried to explain the more they just said it was my fault and that I will not be reimbursed