Awful Premature Cancellation Experience

I sent my first cancellation for cellular number ***, acc. # I***/4 16 October. I got no response. I followed up again in October and was given poor advice on how to proceed. I resent a request 6 November 2021 and finally making progress 13 November after engaging the brand on Twitter. I was told to pay a settlement amount of R2399,76 - which I was advise via a Premature Quote would be the amount I pay to get the contract cancelled . The amount was paid in full 24 November and I was assured all was in order. 7 December 2021, I get another invoice. On enquiring why, I was told the amount is for November. I am beyond disappointed by this experience as I ultimately end up being made to pay for the brands poor and slow resolution of this issue. I left SA 1 October and refuse to pay for yet another month of no service!