Unsuccessful Contract Cancellation

Vodacom is *****ing my money. Vodacom keeps on sending me invoices. I have explicitly stated on a phone call that I bought myself out of the contract. I try sending emails but I have better chance of winning the Lotto than getting a reply from them.

I was promised that Dimakasi would send me a Payment Settlement Letter to confirm that my account has been settled. The letter never arrived. I am highly upset.