oh joy, another pain in the butt telemarketer. they call and when you answer they don't speak. I wish I had their money to waste... you got to wonder, why are they doing this and what are they getting out of it.
You have been the victim of a "predictive dialer" that has had more calls answered then the number of live agents available. Typically these dialers are programmed to simultaneously call a few more numbers than agents since the caller centers know that only a percentage of calls will actually be answered and they want their employees making pitches rather than listening to the phone ring or to answering machines. You can report these calls to the FCC as "dropped calls" which are illegal. If a pattern of dropped calls is detected for a call center they will investigate, issue fines, and force the call centers to adjust their dialers to eliminate the majority of dropped calls. Repeat offenders receive increasingly stiff fines.