Debited after cancellation of insurance

I have been wrongfully debited from my bank account after i submitted my cancellation letter as well as phoned in to cancel my insurance with Anderson Insurance Underwriters. <br> <br> I have tried to resolve the issue multiple times by calling into the call center however i was on hold forever and continuously moved between departments.<br> <br> I want my money refunded to me effectively immediately as when Anderson Insurance Underwriters needed to debit me there was no hesitation with the debit order.<br> <br> Please sort this matter out asap.