Cancellation that does not want to be cancelled by Vodacom and put me in arrears

I made a early cancellation last year on the 25th of September 2024 the quote I recieved on the 10th of September 2024 I made payment at the protea glen mall Vodacom store I then called and advise where should I send proof of payment etc,I did exactly that and moved on with life , Vodacom cancellation department did not do what is expected of them , this year I then do a follow up on the cancellation, they discover nothing was done , I then send all the proof of payment to Caitlin Wilfred I assume is the supervisor he then give me their email address I send everything , my number is then cancelled but the everything they requote me for the same mistake I then call them and explain why they re-quoting me where else I did the payment and everything they then realise it’s on their their but no one wants to take accountability instead I am now in arrears for something I paid long time ago then then tell me to wait for 7 working days cancellation refuses to assist me they keep sending me to billing and billing is saying cancellation department needs to sort it out but no one wants to do that can you kindly intervene