Collect America

I have like $7,000 in debt, and like a month ago I got a letter from J.A. Cambece Law firm saying that they represented CACH.LLC and that they were collecting the debt. I called them right away and only got voice mail. Like 2 weeks after that I got another letter saying that their client had agreed to do payment arrangements , to contact them. I call them that day and I spoke with someone at the office. They passed me to like 3 different persons. The last person on that I spoke to me starting going on how I needed to pay the full amount that same day and that by doing that they would let me pay like $5000 instead. I told them I did not have all the money but that I was willing to make payments, the reason I had called was because I wanted to pay my debt, if I had the money I would have paid already. She started saying if I did not pay they would go through a legal process and sue me. She said that I should tell my parents to give me the money or to put it on a credit card and that I had until 4pm that day.( last Friday). I told her that I did not want my parents involved( I'm 25), she said that it is better they know now because they would find out when I go to court. She didn't even listen to me, she just said I had till 4pm.. That same day I had enrolled in a debt consolidation program, but they would only call them until this week. This past 2 days I've been receiving calls every hour from this lady at Cambece, she called my work, she even found out my email.. When I told her yesterday that someone would be contacting her from the program I enrolled, she said she could not work with me or with the program and sent me a letter, which was done yesterday, saying that the debt belong to her office now and just went on and on... Is this right? Like do I have to pay the whole amount? I don't have all that money? Also, will they not accept to work with the debt program.. I really want to pay my debt, but I can't pay it all at once...