So you created an account, were emailed the password, and that's it? THAT"S the problem? You never saved your payment information - which if you use Visa/MC you're 100% protected from fraudulent transactions. And an attacker would gain what? Knowledge of the sex toys you like?
Not even sure why I'm wasting time posting this.
Next time before you post stupidity, actually do a risk assessment. Too much 'security research' is concentrated on a single action, and people are having a REALLY hard time seeing the big picture (or the 'forest through the trees').
The reason they're not responding to you is because you're not worth their time. They have products to ship, and actual customer service to provide. They will have zero problem dropping a pain in the ass customer with minor complaints that they want to publicize for their own personal gain.