First time getting their calls today. Got six calls in about 6.5 hours. They called four times this morning in less than 1.5 hour (from 10-11:30) and then two more calls just now within half an hour of each other. (after 4pm) I didn't pick up at all, but this is pretty ridiculous.
Look into the TCPA Telecommunications Practices Act. $1500 damages per violation for a computerized call to a cell phone when there is no prior business relationship.