If the links to the platform are legitimate, try (carefully) logging to one of them and see if you can get more info on the person who created the account. Did

If the links to the platform are legitimate, try (carefully) logging to one of them and see if you can get more info on the person who created the account. Did they leave other information on the platform: Name, number, login history? Are they dummy accounts or are they really used by someone? It may be an honest mistake.