Rain unfair Treatment and Debit

I've been calling rain for the past 2 weeks to cancel my subscription from the 24th of Dec 2023. However, every consultant I speak to, they tell me the matter will e escalated for cancellation due to a pending sim de6. On 30th Dec 2023 I called in again to check how far the cancellation was, only to find out it hasn't been done. I was asked to pay for the Dec. Which I did and to avoid being debited for jan as I no longer need their service. I then told that it will be canceled and no debit will go for jan.

4 jan 2024 I'm told they will debit when I called on and the subscription was not cancelled on Dec 2023. Meaning I will be paying for a service I no longer have nor using because I sont even have their sim anymore....