abrasive disrespectful communication

I have received 2 messages left by this company and my daughter one, all in regard to me. I called and the woman on the phone new my name and complete ss# with out even asking, which is a violation of the Fair Debt Collections Practice Act.  In addition the lady refused to identify herself or provide any information, strictly yelling stating they will see me in court and hung up.  No one should encounter this in any way, but in my particular situation I am an active chemotherapy patient. My priority is only my health.  Something must be done and I with no hesitation will communicate with my attorney.