This can cause confusion to the investor of both sides, well have you done significant move to let this know from the both teams of the said companies? if you did so, they need to set an arrangement because it's plagiarism if the copier won't replace their logo.
I have only posted here in the forum. Is there anyone from nexo or matic team here in the forum to comment on one of its post
Did they replied to their forum? I guess only few people uses their forum and people from telegram group are even more active that their forum. I don't have contact to nexo's team but their telegram group is
https://t.me/nexofinanceTheir website nexo.io even has the chat feature where you can inform their management through that. And I'm sure that it will be reported to the people who are responsible for checking this kind of thing.