Vodacom - settlement paid but still not cancelled 5 months later

I cancelled and settled my account with Vodacom. Settlement requested was paid on the 25th of February 2022. In March I received an invoice, so I sent another email on the 31st of March. Cancellation not done & no response received. Spoke to customer service in May & forwarded the settlement payment again & still nothing. Its July, new invoice received and cancellation still not done. Absolutely pathetic!!!!