My notion is that you should call out WooMe. Go for it. However, as an author it is your responsibility to try to research as much as possible. It does seem, from the surface level that you described, that those messages are spam/automatically generated. However one could come up with a semi-plausible bordering on the edge of legitimacy rationale why you had received those messages. Maybe WooMe discovered a novel way of nudging users towards communication with each other, maybe they get Achievement Points for sending messages to new users? Likely? Not really, However, chatting with a very cleverly disguised CTA does not constitute thorough research.

call out woome. the situation looks bad. it probably is bad. but call out woome with facts, not speculation. that is the notion.