Received threatening call at my place of work. Caller identified himself as XXXX XXXX from XXXX XXXX. He verbally called me names such as " XXXX '' " Lying XXXX ''. Threatened to garnish wages, sue for total of {$15000.00} when judgment only states {$5000.00} and not mentioning of any current legal law suit or legal documents to state his facts. Furthermore, I verbally requested for them not contact me at work or during working hours and verbally requested all notifications to be done via letters by usps mail ; however, they keep calling. Collector stated that he does n't have to contact via mail and that he can do whatever he wants. I am concerned for my well being and mental health if this does n't get resolved ASAP.