TWSD: keep spamming even when they say they'll stop

About a month ago I posted about receiving spam from a psychic attempting to sell me candles and stuff. The spammer was sending mail from a company called “Garden of Sound” using an ESP called OnLetterhead. A brief investigation led me to believe that unsubscribing from the mail was not going to do anything.
The post prompted an email from Scott B. the VP of Marketing of the company that is responsible for OnLetterhead. I replied to his email, pointing out a number of things he was doing that made his business look like an ESP front for spammers.
After he received my mail he called me to talk to me about the content of my post and the email and to assure me they were immediately implementing one of my suggestion (that they not put a generic “here’s how to unsubscribe” link on their 1000+ link domains, instead have those actually point to their AUP and corporate pages). He also assured me they took my complaint seriously and I would no longer be receiving email.
Guess what?
Garden of Sound is still spamming me from OnLetterhead. They’ve not even managed to implement the changes they pledged would be rolled out the same week as my blog post. Sure, the domain I’m getting spam from is different, the physical postal address is different, the product is different, the friendly from is different. But the preheader still says “this mail sent by Garden of Sound.” It’s all the same list, it’s all the same company, it’s all the same group of spammers.
Despite Scott’s attempt to convince me he wasn’t a spammer, it seems my initial impression was right. OnLetterhead is simply are a company attempting to look like they’re legitimate without actually taking any responsibility for the email going out from their network. They can’t even manage the bare minimum.
It’s companies like this that give the rest of ESPs a bad name.