Unauthorized and ******* Debit

May you please assist in reversing the unauthorized debit you (Outsurance) made to my account. I joined insurance last year and i paid for the whole year Earlier you emailed me a quote which I rejected. nobody called me to discuss and negotiate the premium and no instruction was given from my side to debit my account and to my surprise this morning my account was debited *******ly. Please return my money to my account as a matter of urgency. I am really disappointed and will definitely go back to my old service provider.