Is it illegal to call and threaten to send a text message to ask for an account?

What is the content of the phone threat? It is ok to send a short message to the current account, and the short message reminder record can be used as the basis for interrupting the limitation of action, and the specific content needs to be related to the arrears. Don't make harassing phone calls and say things that threaten the personal safety of the debtor, especially those that threaten the personal safety of the debtor's family.

If the way of debt collection doesn't work, I suggest you take the legal way of debt collection.