"World Listener" -- you spammed every radio news group with your ad.

But commecialism is not allowed on any of them

Read the charter of the newsgroups at URL:

http://faqs.jmas.co.jp/FAQs/radio/personal-intro

Each newsgroup has an intended use and you violated all of them.

Just so you know.

Folks here will more likely NOT buy your product because you are not following the news group charters.