Has anyone had problems wiith purchasing HHO items online?

I dealt with a Online Merchant called "HHO Extreme" and ordered a oxygen sensor extender & a couple of circuit breakers. I got an email from PayPal notifying me that they collected my payment for the Merchant and then I waited.
After about 2 weeks of waiting I attempted to contact the Merchant which in turn sent me an automated reply. I did this again the next day and got the same response.
Then my CC statement came & it showed that they had been paid.
I then contacted PayPal via telephone & got a rep that told me he would start a case file & woule update me via email.
Not long after, I got an email from PayPal stating that they couldn't resolve
my problem because they did not handle issues with the quality of merchandise only purchasing problems.
Nevertheless I had it taken back through my CC company.