July Cancellation ignored and new invoice sent for August!

I have cancelled my Vodacom account, completed all documents as requested and made final payment per the cancellation quote.

Subesquently I have received another months invoice (for August) and the payment I made for the cancellation was debited against the monthly bill for July and August?

I have then tried to call with no luck and had conversations on social media with a request to send all details to the social media email address which I have done with now no reply.

I would like to close this up asap please - can someone effective please contact me via EMAIL not telephone.

I now live in Monte***** and dont use this cell number (hence the cancellation) - yet everytime I have contacted Vodacom and state this the first sentence in reply is "we have tried to call your number..... "

I am pretty frustrated by this as my wife has had the exact same issue for three months - really frustrating guys. After years of being a great customer and you gave good service this is a terrible way to end the service relationship!

Regards Richard