Cancel this contract asap

In May 2021 i called to enquire about cancellation on my account, i was told i cannot cancel than it is due for Cancellation in July i than called in July and was told i cannot cancel now and i can only cancel in November. On the 12 August i called in and i was told the cancellation date is the 01 November 2021 and i should call towards the end of September which i did today, The lady i spoke to did not know what she was doing as she tells me the cancellation date is the 21 November now.

Than she says this account was cancelled in May and they are still debitting my account which is utter nonsense , i want this cancelled effective the cancellation date 01 November 2021