Huge billing blunders

<p>When I upgraded my phone back in May through the vodacom call centre the person seemed uncertain as to what to do. He suggested I take the 10 gb once off promotion offer, which I said I didn't needed. He added the offer anyway, afterwards he logged a call to have the once offer not be repeated monthly on my billing. Now 3 months later I discover Vodacom is still billing me R500 every month for this where the data already expired. And my only recourse logging a call to their billing department who ignored my previous call and that call has a turnaround of 7-14 working days. With cellular providers taking so much off our money every month who knew that they had extra to the bill that the client didn't. Defintion of day light *******?</p>