Incompetence and *******ion

My contract with Cell C is expiring mid February 2024. I've received numerous calls from their call center agents asking me to upgrade. Unequivocally, I've stated that I want the contract cancelled on its expiry.

In December, I wrote to their customer care line and advised them that I intend cancelling the contract on its expiry. The email was acknowledged and an agent called. I told her my intentions.

I continued to receive upgrade calls, so on the 9th January I wrote a second email notifying Cell C of my intention to cancel. Again, the email was acknowledged and an agent called.

Today, yet again I received another upgrade call. After telling the agent of my intention, he gave me a number to call. I called the said number and expressed my intention. I was told that despite having written 2 emails, my cancellation was not recorded and that they will debit my account for another month. I asked to speak to a manager and was told the manager will call me back, this did not happen.

After having told atleast 5 agents and written 2 emails expressing intention to cancel, Cell C is insisting on debiting my account. I view that as *******ion and greed and take an exception to it. I am utterly disgusted.