BIC & IBAN numbers

Right dunno if anyone will know of not but worth a try.. banks not open and neither is insurance..

basically i took out a new car insurance policy and got the letters through today, the page at the back goes through all the information for the monthly payments.. the only thing is i have received someone elses page and not my own - showing all their details. that would say to me that either they or someone else has received my information - my name, address, bank, bic and iban numbers. does anyone know if someone knowing this information is likely to affect my account?? will they be able to do anything like take money or whatever as i have no clue..