calling and hanging up

Today, 17 August 2015 I received a call from the number ***. The lady said that she is from Blake and Associates and that she was calling in connection with an overdue Woolworths account. I immediately responded by telling her that the account had prescribed. She proceeded to ask me if I knew what prescription meant. Before I could answer she hung up the telephone. I then received a text message on my mobile telling me to contact them to make arrangements to pay. She never disputed my claim that the account had prescribed but now they want to use a sly method to get me to break the prescription. I stand by my claim that the account has prescribed.