In Australia we have a Government Agency/Department called "
Consumer Affairs" which you can write to, to complain about unfair/unlawfull treatment by a supplier or retailer. This government department then contacts the said offender asking them to make a defence or make amends for their actions.
Also, a widely read Australian PC mag called "
APC Magazine has a section in it called "Watchdog" which you send your complaint to then they contact the vendor for an explination of their actions then also sends the vendors reply to the Government Dept for a reply too.
In the magority of cases, the vendor makes a full appoligy and arranges for a replacement before APC contacts the Government Dept.
I don't know about the USA / UK or Canada, but you could do a search to see if you have a similar government dept, or have a browse through some PC mags there to see if they have a similar section.