You should stop "working" with them (video's and VAT numbers prove very little).

This "company" is not trustworthy:

The recycling factory they were supposedly collaborating with explicitly denies any doings with them.

They are setting their company up as a Ponzi in their very own policies.

They are being prosecuted by a member state of the EU.

Even the basic information like bio's (or just names) of their executives is not provided by them.
(But that's understandable as one of them is actually part of the Colbitex fiasco.)

Actually the company is constantly lying, like for instance in case of their alleged dealings with Plamika and McDonalds.
(And they keep on lying [and deleting enquiries] about [into] that.)

Or maybe you have found/gotten, and can provide, their basic financial numbers in a prospectus or annual reports?
Without these there is no basis for cooperation!