Harrased over a 6 year old account

I am being harrased by VVM attorneys for a six year old account i have been paying off with another company. They phone me anytime from six o clock in the morning till nine o clock at night. They will not listen to what you have to say and bombard you with demands. As this is prescribed debt i do not have to listen to this people threatening me. Please do something to put these people out of bussiness as they are really *********** idiots!!!