my friend, they needn't to prove anything about this, they don't own counterparty, counterwallet or counterparty dex.

there are guides everywhere, you know Google?

you should feel only gratitude for of the walkthrough video they made,

is not written anywhere that they have to teach you how to use the counterparty dex, transfer/sell tokens ecc.
this should be up to your diligence....

and if you have invested without knowledge, you have made a mistake, but this should be true for all the crypto world.