Vodacom: credit on account

Vodacom Customer Care or any department that can resolve this matter: Account No: I ********** -6

ref number is: 1- ********** **********

Here we go again. A year to sort out query but when I eventually receive a credit - what does Vodacom do, deduct the monthly premium from my bank account. So I have to log a call to tell them - use the credit amount. What company gives credits but do not allow you to use it on the account you have with them. Vodacom can we sort this out once & for all PLUS bank fees I am charged as well as previous data which was suspended. Extremely unhappy client. Sue Neill ********** 133 **********