Cancelled contract, still being invoiced!

<p>I cancelled my contract with Vodacom last year, 6 months after the 2-yr contract had expired. On 30th September I ported my number to MTN and paid my last invoice in full. </p> <p>Despite receiving confirmation from Vodacom's porting department that my number is no longer listed with Vodacom and that my contract was cancelled in time, I have continued to receive invoices from Vodacom EVERY MONTH SINCE OCTOBER 2016! </p> <p>I have spoken to countless billing and collections agents at Vodacom, all of whom promise to "escalate" my query and resolve the matter, but I continue to receive invoices (with compounding interest).</p> <p>Why can Vodacom's various customer service departments not all see the same information about their customers (and ex-customers)? How is it that the porting department can clearly see that there is no money owing on my cancelled contract, but the collections department cannot?</p> <p>PLEASE VODACOM, SORT THIS OUT!</p>