No communication

I have been receiving emails and notifications being threatened that I'm going to be taken to collections because of a debt that I don't owe and I have been reaching out to this company to try and explain what has been happening with their client who is escalating me and it's rain but but my attempt to reach out has not been successful because I haven't received any responses to my emails and their WhatsApp was not really helpful cuz after putting my ID number I was told that uh they can't pull up any information under my name but they keep on sending me notifications and emails so I don't understand how this is supposed to help me or their client because it doesn't make sense