Vodacom Here We Go Again !!!!!

For the past three months I have been struggling with my Fire Account billing. First I was sent the incorrect contract and then had to struggle in terms of debits. Last month I was informed that the matter was sorted, but yet again billed this month again. Further, I have also phoned Vodacom in May to cancel a 3GB Bonus Data Bundle - only to find that this still have not been cancelled and yet again billed. I surely do not understand why a call-centre is available if further action is not taken. I am sick and tired of forever having to call the call centre, told that the necessary action shall be taken and then to no avail. Surely calls are not recorded for no apparent reason and are these agents not scored? I will not pay the R150-43 3GB Bonus Data Bundle, already "cancelled" in May and same goes for my Fibre for which I yet again was incorrectly billed for.