Debt collection: Communication tactics

SCOTT & ASSOCIATES continue to harass and come and constantly have individuals come to my home on holidays, nights and multiple visits during the day. This is harassment and I have requested ALL COMMUNICATION BE DONE VIA MAIL. It does not make any sense for someone to come ring my doorbell while and impersonate as if they are delivering a package, I have had individual say they are from the courts only to be given a outdated document stating court for over a year ago. I DO NOT WANT ANYONE COMING TO DELIVER ANYTHING FROM THIS COMPANY THAT CAN BE SENT VIA MAIL. This is harassment and I want it to stop. I am gathering videos of each of these encounters that continue to happen after i have requested for it to stop.