Airtime Dissappearing

Good day Vodacom,

I would like to bring the following to your attention.

I am a loyal Vodacom customer, however i am experiencing some issues with my airtime. I bought R60 on the 13 September 2017 and R29 on 19 September 2017. My airtime is disappearing . I am not making calls. I cant understand where my airtime has gone. I dont have any airtime left. I spend a lot of money every month and been extremely loyal to Vodacom. I have seen reviews on Social media, seems i am not the only customer having this issue. I am very disappointed. Please investigate and advise urgently.

Kind regards, Ighsaan