Unresponsive on cancelations request

I emailed my cancellation request to *** on 20 October 2020 to give them notice of cancellation from end November as per the one month notice period stipulated in the contract. I received a follow up email on the same day where they acknowledge the request and advised that a consultant will contact me regarding the cancellation. I am still waiting on a consultant to contact me.. I eventually received an email on the 6th of November 2020 from Supersonic which includes: “ We tried to contact you several times regarding your cancellation request, but we have been unsuccessful” – this is untrue. Also in the email “We cannot proceed without verifying important information with you”. I have now written 2 emails to *** and been in contact with the call center instructing them to complete the cancellation process via email as I am currently out of the country (hence the reason for leaving), but without any response from Supersonic what so ever. I WILL NOT be billed for another month because of your lack of response/action.