Final Letter of Demand? You must be mistaken

At this point I wish I could give a negative rating, this how pathetic Vodacom Customer Service is overall. I had two Contracts with Vodacom. One was for my cellphone and the other was for a modem. I cancelled both contracts on the 23 October 2017, and paid the remainder of what was out standing after I had received the cancellation fees from the Vodacom store in Sandton. I then sent an email to the cancellation department as advised, stating the following and attached my ID, Cancellation quote and the receipt of payment for both contracts:

"Good day

I would like to cancel my contracts with Vodacom.

Please see attached Invoice obtained for Settlement amount for both contracts. Along with receipt of payment for both contracts.

Could you please retain the 079 *** **** number as Prepaid.

Please provide certificate of cancellation.

Thanking you. "

I did not receive any response, so naturally called the call center, to confirm that they had received my cancellation. The call center agent assured me that it was with the back-office and will be processed. My debit order had stopped and then months late in July & August 2018 I got debited for the exact same amount as my usual debit order before I had cancelled. The Vodacom billing team also started to send me invoices. FOR WHAT? I had cancelled my contracts and paid for my cancellations!

For months I have been struggling to get someone to assist me and I have been referred to a different department each time I either called or email. I have forward the same email confirmation and discussion to the following departments: -Cancellations -Customer Care -Contractor from Bytes Tshedza Ramavhale (He referred me to some Admin team) -Vodacom Billing -And recently, Subscriber Collections, that sent me a Final Letter of Demand lol seriously... This is pathetic. I refuse to pay for this after taking the appropriate course of action. LOL can you believe that no one has gotten back to me after over a year, it is still not resolved.

CAN VODACOM PLEASE JUST SEND ME A CANCELLATION CONFIRMATION! AND CLEAR THIS UP!