Cancelled contract still gets debited from my bank

My data contract expired, was cancelled, and still gets debited from my account.<br> After NUMEROUS phone calls, I started making notes and taking down names, and 7 weeks after the last promise that I would be refunded, not only was I not refunded BUT ANOTHER DEBIT WENT THROUGH MY ACCOUNT!!!<br> <br> Cell C truly is for YOURSELF, because it's most certainly NOT for customers!<br> Why can't someone phone me BEFORE my contract expires to ask if I want to continue it? Why does this happen THREE MONTHS AFTER the contract expired AND GOT CANCELLED?<br> Who's paying for my numerous phone calls to the call center? Who's paying for the debits through my account? My bank charges? My credit profile indicates my debit orders get returned, WHEN THEY'RE UNAUTHORIZED TO START OFF WITH!!!<br> REFERENCE ***<br> CASE NUMBER ***