witchcraft data charges

<p>i recharged with R29 on the 03 March 2017 and within a second after receiving a confirmation sms i dialled a number to make a call and i was called that i have insufficient airtime available. i called the 111 customer care and was told that i must switch my data off which i do understand but can some one plz explain to me, how does R29 dissapear for "data" in less than a minute? i did not even connect to the internet as i use the phone for business calls only? looks like i have to port tom another network as this is totally unacceptable.</p>