Cancelled my policy but still debited

at the beginning of this month my debit order never go through so I received an email from budget confirming same, I responded to the email saying please cancel my policy, today they debit my account firstly there was no funds in my account, I have not given them consent to debit my account besides the day of the debit order which is normally the 07th of every month, now I have a return debit which, you guys are going to pay for the return fees as I did not give you permission to debit and besides that I have cancelled my policy, please assist with a refund of the return debit fees as you guys have not been given permission to debit and I did request for the cancellation to be done, please communicate by email as I cannot take personal calls as work.