Debit order for non existing policy

Good day, I had a discussion with a Meralda about a policy which did not take effect as yet, we discussed the premium of which she could not adjust to beat a competitors price. At that point in time I told her to cancel the policy and not debit my account. I did stress on the fact that my bank account should not be debited exactly 3 times which she agreed to. She had assured me that the policy is cancelled and no debit order would follow and that she would forward a mail to me with a confirmation. I did not receive an email and today on Good Friday I find that a debit order has collected money from my account for a policy that does not exist! I want my money returned immediatly and an apology. Should the funds not be transfered back into my account by wednesday the 8th of april i will instruct the bank to reverse the debit order and pursue legal action to collect back my money and all asscociated recovery costs. I do have the telephone call recording. This has now affected my easter weekend and is unacceptable!