Unauthorised debit orders

Hi, the following debit orfers were processed on my account without my authorisation. I have not signed up for any contract with Wildfire or anyone else for that matter for almost 3 years now. Please reverse these debit orders (see the date, reference nuumber and amount below)<br> <br> 24-Jul-15 WILDFIRE 9180WFP1R2839 15 99.00 <br> 01-Jul-15 Wildfire 9180wfp1r*** 99.00 <br> 17-Jan-15 DIGICASH 14AY9 RCSH DB 14 99.00 <br> 17-Jan-15 DIGICASH 15SP3 EPANIC 14 99.99 <br> 19-Dec-14 Digicash 14ay9 Rcsh Db 141217 99.00 <br> 19-Dec-14 Digicash 15sp3 Epanic 141218 99.99 <br> <br> I am also interested in knowing how Wildfire got my account details.