Vodacom promises to Fibre because they cant provide service but doesn't send me proof that it has been cancelled

Vodacom Fibre is not capable to maintain the Vodacom Fibre. My Fibre as been more off then it was on I have been paying for 4 Months now without Fibre, Vodacom said that they will now cancel it from there side without me paying any fees because they can not provide service.

I have been asking that they Email me proof that it has been cancelled and that the there is no money to be paid and that there is no outstanding monies. They promissed me that they will send it but I dont receive anything from them.