Dispute over data and bad service

I called the customer service yesterday (3 october) because I was having a problem with Data. I have data tat is expiring on 5 october and I topped it up. Now the data that I topped up is the one that is being used, and the balance is just waiting there to expire. That is my hard earned money that Vodacom chooses to take from me. I spoke to the customer service consultant who told me it is policy. What kind of policy is designed to take from your customers? The customer service consultant promised me that someone will call me. I requested that someone calls me before my data expires. No one has called me. Instead I received an sms telling me to go and check something online, using the hard earned data that I am querying. Seriously Vodacom!!!! I am really tired of being cheated by you. Please do something about this. I was given this reference number for my query: 1- ********** **********