70233 ftp upload script for website

I need someone to add/complete an FTP script for my site. The site has a builder that gives an option to either download a file in zip format or upload to an existing site. However it does not seem to have been completed as it does download but does not seem to upload to a site, when tested. I had this recently built for me, but the builde may have forgotten to complete this last part. I do not know what this should be listed under. The FTP part was started but it seems not completed. I need to have it completed. For more details about it please ask.