Match names in a csv file with contacts in a Salesforce Database & Create records

Bank deposit records in a csv file need to be imported into a Salesforce custom table called Debtors. The Contact who made the deposit has to be identified before the Debtor record is saved. The reference in the bank deposit record has to be matched with the contact name, alias and/or phone number. These are not always accurate and often have spelling errors A sample file from the bank is attached. Records with codes JCRTI, TCR15, JCR10, DEP01, TCR07 are to be imported The date format needs to be changed to an acceptable SF format Zulu time needsto be added to deal with the time zone in Australia so the imported date is not incorrect by one day, A custom object debtor record needs to be created including information like amount, date, reference, code The Contact who paid this amount needs to be identified by matching the name or phone number from columns F & G with contact records If a definite match is not available the debtor record should be saved with Contact name "Unresolved" Question - how will you create and test this code in my SF instance when we dont yet have a trusting relationship ie we dont want you to have administator rights I look forward to your answers. This will be the first of many SF projects