Yikes! This is disappointing feedback, to say the least. Each employee was given a handful of Hook-Up codes to hand out, but to think that yours wasn't entered in good faith is a let-down. Did our salesperson provide you with the code that was intended for your account in the written paper he handed you?
While the Support Community is a public user forum without individual account access, there is an escalation process our internal teams have for Hook-Up codes that are not properly applied, so if the code is written down this may be a simple matter of reviewing eligibility criteria and sending the details off to the appropriate contact point. It's awful to read that you haven't had luck returning to the source for assistance. Our best suggestion is to Contact Us and work with either our Care team or T-Force team so that we can review the situation further and see what options are available in these circumstances, as well as reporting the incident. While we can't make any promises, we definitely want to do what we can to make it right.