This telemarketer most likely uses an autodailer (or predictive dialer) to make these calls, which is illegal. You can report each violation to the FCC here: https://esupport.fcc.gov/form1088/consumer.do
I should clarify something about the autodialer. The calls you're receiving are illegal because federal law prohibits using an autodialer to place calls to cellphones. So you can report them to the FCC at the link above. Good luck.