Overcharged on contract. Being charged for BBM data incorrectly for 2 years!!!!!!!!!!!!!!!

I have had a contract with Vodacom for many years. I have the Huawei since January 2017. Before that, a Samsung for 2 years and before that, a Blackberry.

Recently I noticed that Vodacom has been charging me R20 a month for BBM Data for the past 42 months and I haven't had a Blackberry. I contacted your call centre to cancel the data but was told that they cannot credit my account or reimburse me for the approx. R840 I've been paying.....FOR NOTHING!!!!!!!!!!

I was told that it was my responsibility to call Vodacom and let them know that I do not use a Blackberry anymore. Why should I have to tell you something that you already know? Do you not have a software program you use to keep track of changes to you client's accounts? This is absolutely unacceptable. I didn't check my statements before because I assumed when I took the Samsung, you would cancel the BBM data. But no, it was too much for you to do. I wish to either be credited, or reimbursed with my money please. Account number: I ********** -3.

If not, I will most definitely take this further until this problem is resolved. If we miss a payment you hunt us down, but when you wrongly take our money, we cannot get assistance from you!!!!!!