Debited account after agent informed me no debit

I phoned SA Underwriters on the 1st of March to send me the policy wording as they never sent it as promised. I then phoned my current insurer and got a much better deal. I phoned SAU the evening to cancel the policy and spoke to Brenda which told me that I can't cancel the policy as they sent the confirmation of cover to the dealer and I first need to send the confirmation of cover from my insurer to them, I then asked her if the policy will then be cancelled and she said yes as they will then phone my husband and cancel it. I sent the confirmation that same evening and my husband NEVER received a call from Brenda. I phoned Brenda yesterday (2/3/2016 at 14:32) and she said that NO DEBIT will go through our account only a R150 cancellation fee - WHICH WAS ALSO NOT MENTIONED TO MY HUSBAND. My husband received a message this morning from his bank that the debit order of R306.45 Ref SAU*** went off his bank account. Please pay back his money as soon as possible....