Strange tele call

Last Sat. my phone rang and I looked at the number,(no name available). The area code was out of state and since my husband passed away recently and we have friends all over, I answered, the caller, who gave me a first name, asked for my husband, but used his nickname,( which he never used for legal or financial matters. My husband's last name was never spoken by this person. I told him he was not present, but I was taking care of his business. He kept insisting that he must speak to ... (nickname). Several times I asked his last name and the nature of his call. He gave me a last name, but was muttering and I could not understand the last name. He said that he was calling from an attorney's office, but would not give me any more info. I finally told him that the person he was looking for had gone to heaven and he would have to go there to talk to him. The caller then called me a "smart a..". After a bit more talk I hung up. In a very few minutes the phone rang again. I looked at the caller-id and it was the same number. I did not answer. As I thought on this, due to the fact that my husband had recently passed and I had lots of legal, financial responsibilities to handle, I was a bit concerned. Knowing that all my husband's bills had been pail, I really felt that this was a scam call, but finally called a person to investigate this call.
It was learned that the call came from the state of New York and was a collection agency. The law person, who was investigating for me, advised me to call the number on Monday, ask for the manager, report the "naughty accusing name calling" and seek to learn the nature of the call. I did so, when the phone rang it was announced that I had reached the Burgess Law Offices, and invited to ring the extention or someone would be on line soon to take my call. Soon a man asked how he could help me. I asked his name. He said he was Robb. I told him that I wanted to talk to the manager. He said that he was in charge. I told him the events of the Sat. call and he excused himself to get the info. Then another man came on the phone. (I thought it rather strange that Robb told me he was in charge and he allowed another to take over) This man sounded like the "Steve" with whom I had talked on Sat. I asked him his name and he said something so fast and garbled that I could not understand, I asked again, he replied, "I don't have time to play games, I gave you my name...etc." I attempted to learn why they had called and asked for the person, he said there were no records there, that since I had told them that he was not in the residence they had removed his name from the records, he had no information, I kept trying to learn something of this situation but to no avail. Why would a collection/law office in a state
1200 miles away from our home, a state in which my husband had never been, have my husband's nickname and be attempting to collect -who knows what? I told "Steve" that if he could not give me any info I would begin investigating. I am quite sure that this is a scam...if there WAS money to be collected, why has there been no notice in the mail? Thanks for any info or advice.
Wondering....In MO.