Note: I work for VeriCite
MIght I suggest an alternative. VeriCite has a fully approved Moodle PlugIn for plagiarism detection and you can sign up for a free trial, get access, integrate your trial to Moodle, get a quote for your institution and sign up for the product all without talking to anyone if you like!
If you DO want to talk to someone, feel free to reach out to me.