They are from the HCG 5000 diet drops company. I called because they were offering a free trial to those who are interested in losing significant amounts of weight in a short period and those who would participate in the market trial. I bought into the scam and called. Turned out that ONE bottle of drops are free if you purchase a three months supply for $99.00 US. I declined the offer and they continue to call and when I pick up nobody is speaking on the other end. They call multiple times a day and don't leave a voicemail.
I did the same thing. The radio commercial said it was a market clinical trial. Usually you do not pay. When he said you buy a supply for 99.95, I told him I was no longer interested. I wonder how to get them to stop calling!
I have received several calls to my cell phone from this number, also. No one on the line...heard recording say "Thank you for calling. Goodbye." I too called about the HCG trial. As of a report today on CNN.com the FDA has declared the HCG supplements illegal. Consumers beware!