Utterly disgusted with the lack of service

I sent a cancellation of contract on the 22nd May 2024 due to a total write off of my vehicle. Case Number Logged ***6 and received a receipt of cancellation where I have to pay a settlement amount whereas my contract has already lapsed anyway (Two years). I have tried numerous times to call and follow up as they keep debiting my account two months later. Every time I call their number ***/8070 and they hear that I am calling regarding cancelling my contract, they transfer me to another extension where the phone just rings and rings without an answer. This has happened numerous times. I have been holding only today for more than two hours and no one picks up the phone. I need this resolved ASAP as I cannot keep paying for a service that I am not using.