As someone who has contacted the CEO of a large corporation (CEO of Costco) successfully over a customer service issue with a resolution in my favor, here's my advice:
Don't send an email or call or fax.
Find out the mailing address of the corporate HQ and WRITE A PHYSICAL LETTER addressed to the CEO by name at the HQ.
In your content, be respectful and list the issues in a factual manner and then point out how you are harmed by this and request resolution of your problem. Make sure to sign it by hand and mail it off. If you really want to make sure they receive it, send it registered etc.
Though this may seem old fashioned, it gets attention. Yes, an office assistant will be the actual person who reads it but the odds are very high it will get shown to the CEO. In my case, the Costco CEO actually had his assistant type up a response, sign it himself, and overnight it back. Also, there's a better chance you might see meaningful changes. I did and I got a check for $100 and an apology.
Just my thoughts.