J.A. Cambece, please help!

I got a letter from Cambece stating that I have an outstanding debt owed to CACH, LLC. It is a debt that HSBC sold to CACH. I started to get phone calls from Cambece within a few days of getting the letter. They demanded payment in a lump sum, and gave me just 2 days to come up with a "satisfactory" settlement. A payment plan was refused, and I would rather settle anyway.

I sent a Debt Validation letter, CM,RRR on Monday. I'm guessing they got the letter today (Wednesday) because it is the 1st day they did not call. I talked to them once, when they 1st called, and was asked what I could do to settle the debt. The amount owed is almost 13K. They said their client would wave all late fees other penalties accrued and the amount owed is $9400. When I told them I would not have been in default if I had $9400, they asked what I could come up with. I told them that I could get about $3000 dollars in a few weeks time. Not acceptable. They gave me 48 hours to came up with a better solution. I was told to ask family members for the money. When I told them that was not an option, they accused me of trying to skirt the debt, and questioned my intention of paying it.

I was told "off the record" that the client will usually settle for "around half" if they get the money promptly. I have not had contact with them since, knowing they were about to get my DV letter.

I also asked for their license # that would allow them to attempt to collect a debt in my state (Wisconsin).

As of now, I have received nothing from them. As I stated, they probably just got my letter. I have not received the confirmation from the USPS, but expect it soon.

My question is, where do I go next? I have been reading other threads on here, and while there is lots of info, it's hard to piece it all together! If they can validate the debt and can legally collect in WI, what are my options? If they can't, what do I do?

Thanks in advance!