MTN Sky and still billed for calls

I have an MTN Sky package that is meant to be unlimited calls and yet every second month I get charged for calls. This has been going on for a year.<br> <br> I have logged tickets with no feedback or response and when I call to enquire two weeks later I get told that they will log a new ticket and someone will contact me. <br> <br> Last week I was cut off due to my credit limit being exceeded. I asked the person to look at my package and they rep**** with confusion after seeing it was an MTN Sky package and that my account was as always paid up. They released the hold and logged a ticket. <br> <br> That was the last I have heard from MTN.<br> <br> <br> <br>