Megpoid English

Complete ripoff.
Apparently this is an ancient library that requires a previous purchase of Vocaloid. The advertisement here is strongly misleading.

Looking at this advertisement which I stupidly responded to:
https://www.kvraudio.com/marketplace/megpoid-english-by-internet-co

The following claims are made:

What is it?
Voice GeneratorINTERNET CoMegpoid English (misleading).

Format(s)
Instrument(s) VST (it's a sound library not an instrument apparently).

System Requirements
Host application compatible with: VST plugins (and Vocaloid itself!!!!!!!!!!!)
Mac OS X (10.8 or later).

Videos shows on this page suggest that Vocaloid is the product that is for sale here:
https://www.youtube.com/watch?v=bn800cSajTI
https://www.youtube.com/watch?v=86TIL4lrOIQ.

Nowhere is the version number (3) listed.
Apparently Vocaloid is currently at version 5, this seems to be a LIBRARY (not Vocaloid) fpr version 3 of Vocaloid (NOT INCLUDED).

Installation certificates for this program are expired (originally from Yamaha) and a security risk.

After spending $65 on the completely worthless crap in this ad, I am inclined to never spend a dime through kvraudio ever again.

The serial number that I get back for "Megpoid English" is not a Vocaloid license.
I tried entering this serial number at the upgrade site
https://www.vocaloid.com/en/shopping_cart/serial_check_for_coupon/827
and it doesn't recognize the license I was given

I was able to authorize "something" on my computer using the license manager, but I can't find vocaloid anywhere on my computer as a plugin or app.
Also all of this documentation that i received AFTER THE PURCHASE refers to Vocaloid3 - and I see that Vocaloid is at Vocaloid5 now!
WHY WOULD I BUY A PROGRAM THAT IS TWO MAJOR VERSIONS BEHIND THE LATEST???
Even if it worked that is - So far I spent $69 for absolutely nothing.