incorrect deduction

to whom it may concern firstly dont even have a month with you but you already doing as you please on my account according to my aggreement with you my monthly instalment is 518 a month for 24 month you have deducted 750 from my bank account not kbnowing why consider your debit oder cancelled with my bank i will start paying you cash monthly and if you dont refund me an extra amount deducted this month consider your next instalemnt as 518 minus amount an extra amount u deducted from my account this month sick and tired of people how alwys lie to their clients if you not sort this by today am going to the ombuds man you must call to all your call recording and c listen to those call from your agents hwo confirm that whta would be my monthly premium per month