Filing a Formal Complaint
If working with the company directly to resolve a problem with a product or service gets you nowhere, you may have to file a formal complaint. Formal complaints to the appropriate state or federal government agency is not only a good idea to protect your rights, but is also important if you're dealing with a defective or potentially dangerous product.
When filing a complaint, remain factual and try not to include extraneous information. Government agencies, while sympathetic to your issue, can't really do much for hassles such as inconvenience, time spent dealing with a company, etc. They can, however, step in on your behalf to enforce the law. So keep things as brief as possible while outlining the facts in a clear and concise manner. Once you submit your complaint, you can't change it.
If you have any documentation, submit a copy with your complaint. Be sure to organize your documentation in such a way that it is easy to understand and follow, such as by numbering each page and referring to it by page number in your complaint. The government employees reading your complaint don't want to spend twenty minutes trying to figure out which piece of documentation you're referring to in your complaint. The quicker they can read and understand your complaint, the quicker they can respond to you!