DMC bullies me into accepting an expired debt (Prescribed Debt)

On 4/3/19 I received a miscall from this collection company, so i decided to call them back to find out what it was that they wanted from me. This company is collecting debt that i owed to Nashua mobile more than 6 years ago. I explained to them that this debt has expired and therefore falls under the Prescription Act and i also mentioned that it was ******* for them to collect on expired debt and the lady i spoke too said she is aware what Prescription Act is and continued to threatened me that we will meet in court. If she knows that what they are doing is against the law why continue to bully me into accepting debt that i know that it no longer exist.