STOP DEBITING MY ACCOUNT, YOU HAVE NO AUTHORITY

In October I cancelled a new policy because you failed to provide me with a policy document for two months prior to activation (which was meant to happen in October). After much struggle and lots of money and time spent trying to get through to your contact centres this policy was cancelled and a refund made into my account. Much to my dismay I was debited again on the 1st of December 2020. This time I was requested to prove that a debit order went off my account - this still doesn't make sense to me because I cant block this debit order and I cant reverse it. You have my details, you know you made the debit order. Nonetheless I sent the proof to ***. She assured me that the matter was handed over to finance on the 4th December 2020. On the 8th December I did a follow up and once again she confirmed that this has been processed. I emailed her again on the 10th December and this time she ignored me. It is now the 24th December. In a few days you are going to debit my account again for a policy that we never activated. CAN YOU PLEASE STOP DEBITING MY ACCOUNT FOR A POLICY I CANCELLED MONTHS AGO AND NEVER EVEN MADE USE OF BECAUSE OF YOUR POOR SERVICE.