False advertising. Rain won't let me cancel my contract

I moved to a new area where Rain signal is weak so I submitted a cancellation during the first week of December. I only received an email stating they received my request but nothing has been done. I was expecting the cancellation to be done immediately since this is supposed to be a month to month no contract deal as they falsely advertise but instead, Rain had the ***** to deduct the debit order again today. I am expecting my pro-rata refund for the month of December but no, they are already deducting for January for a service i am no longer using.

Each time i try to re-cancel the contract on their website, i get a message that says request has already been submitted. Who is supposed to work on my request? Did they take leave for the full December month?