RAPID DATA DEPLETION

Over the past few weeks I have noticed that my data runs out very fast. I do have applications running but nothing out of the norm . Today was the absolute last straw, I purchased 250MB at my local spar, got in my car entered the voucher number, received the text confirming recharge and then exactly 2 min later (still making my way out the parking lot) I received a message that the data has been depleted. I checked to confirm and to my amazement, it was infact depleted!!! No apps open not logged in to social media nothing - it was just gone almost instantly. After calling the call centre 4 times (cut off 3 times) i eventually managed after selecting 6000 options to get a Human on the line, the agent could not explain and said a service call will be logged???? I then spoke to the manager who also was of no help. Something is very fishy with Vodacom and I don't know when people will start to take this seriously it is THEFT!!! I have heard many complaints regarding this - I will logg a complaint daily until my data is refunded. Also putting this on FB and Linkedin