8 Months Later & My Account Is STILL Not Cancelled!!!

To whom it may concern, I submitted my cancellation of my account on 28 September 2017 for cancellation by end October. This was never actioned and I continued to receive monthly invoices, even though I gave the correct lead time and submitted the correct documentation. I followed up with numerous phone calls and was told that it would be sorted and that my account would be credited. I now live overseas and am still receiving invoices and my next of kin on my original forms is being harassed by Telkom regarding my account. It has been 8 months since my account should have been cancelled. I am outraged. I do not know what to do anymore. I have long e-mail thread of proof of my communication regarding this cancellation. I cannot find an international number to call. PLEASE URGENTLY ASSIST.