Telkom account cancellation. Why I refuse to use any of your services in business.

We cancelled our service of account number: *** on the 30th of September 2022 for the 1st of January 2023. We are still receiving invoices and statements now preceding this date when our final payment was made at the end of January 2023 for the finalization of the account as you bill in arrears for this service. All attempts to resolve this with evidence forwarded and confirmation of the cancellation received from your selves included stipulating the date of cancellation. Yet we still receive invoices monthly. We are a company in run off which will see our doors closing for good shortly. Please get someone who can actually affect the cancellation to contact me.