Contract not cancelled

We have laid a complain last month November on the 5th. Contract which was 12 months for 2020 an was suppose to have been cancelled already an it was not they kept deducting funds. Contract stipulates 12 months an there's no were were it says rental an we being told its rental which is not on the contract. On the 14th December a lady called my dad who is the owner of the contract an she specified we should write cancellation letter an I did same day an it was not cancelled. It's the 27th today an no confirmation recieved for the cancellation. Will we be told that we should wait another 30 days notice for cancellation again were as the mistake is on your side. I send several cancellation emails an included support an accounts emails an none responded. Is this how you handle your inets when they have issues with you? This company is *******. VOX***5. Should we include legal before our things are sorted. Cancellation letter was already send on the 14th December an not cancelled yet all you know is busy sending us monthly statements. This must be sorted