Just got a call from this number, no message, can't be too important

got a call from 504 220 4533 left no message

i received a call on my cell phone from this number (504-229-4533) and it is an automated recording about affordable car insurance. I tried to pressing a button to speak to someone to take me off the calling list but it hung up on me. I tried calling the number back numerous times but there is always a busy signal.