Cancellation Request Not being Honoured

I have been trying to cancel my cellphone insurance for about a year, with the initial request being logged on 18 September 2020 (at approximately 15:48pm) whereby I spoke to an agent by the name Marco William (who apparently worked for Finrite, before my policy was transferred to AdminPlus). I had cancelled my cellphone contract (with Telkom) a month prior, since it was approaching expiration, which was not a hassle.

I have sent a number of emails, and on a few occasions have gone to a store to have the consultant (the one who's name I took is Didintle Neito, Bayside Mall, 21 May 2021) call/email to have the insurance cancelled, whereby a consultant by the name Candice Beziek responded (21 May 2021), who didn't understand my request for cancellation at all, as she was advising about a refund, which I didn't need.

I sent another email (7 June 2021), which Ziyanda Mrubata responded saying that Im serving a 30 day notice for cancellation (which makes no sense, considering I had requested a cancellation in 2020).

Can this insurance please be cancelled as I no longer even use the phone, I've tried getting it cancelled on many occasions and am still being debited. I will not pay for any "arrears" either.